| Description | Date | Identifier | |
| Letter to Messrs. H.M. Hobson, Ltd. regarding the positioning of a K.S gauge on an experimental chassis. | 28th Dec 1928 | Box 44 \ 3 Scan137 | |
| Correspondence regarding the altered position of the Hobson K-S Telegage on an experimental 40/50 HP chassis. | 1st Jan 1929 | Box 44 \ 3 Scan138 | |
| Page two of a letter from H.M. Hobson, LTD. regarding a tank unit modification. | 1st Jan 1929 | Box 44 \ 3 Scan139 | |
| Letter from H.M. Hobson Ltd. concerning the altered position of a Hobson K-S Telegage on an experimental 40/50 HP chassis. | 1st Jan 1929 | Box 44 \ 3 Scan140 | |
| Letter concerning the necessity to manufacture new tank units and modify existing ones for a specific installation. | 1st Jan 1929 | Box 44 \ 3 Scan141 | |
| Telegauges from H. M. Hobson, Ltd., including an invoice and a request for a payment order. | 2nd Jan 1929 | Box 44 \ 3 Scan142 | |
| Requesting the return of Telegauges to a supplier, Messrs. H.M. Hobson, for modification. | 1st Jan 1929 | Box 44 \ 3 Scan143 | |
| Letter from H.M. Hobson, Ltd. regarding an altered design for two sample pump sets, specifically the top plate casting. | 4th Jan 1929 | Box 44 \ 3 Scan144 | |
| Correspondence from H.M. Hobson, Ltd. regarding an altered position for the K.S.180 unit and the supply of trial sets. | 4th Jan 1929 | Box 44 \ 3 Scan145 | |
| Letter to H. M. Hobson Ltd. regarding the modification and return of three petrol gauges. | 4th Jan 1929 | Box 44 \ 3 Scan146 | |
| Letter from H.M. Hobson Ltd. regarding the replacement of gauge and tank units and the supply of a new air line assembly. | 5th Jan 1929 | Box 44 \ 3 Scan147 | |
| Charges from H. M. Hobson, Ltd. for telegauges on 20 HP Chassis. | 8th Jan 1929 | Box 44 \ 3 Scan148 | |
| List detailing the allocation and delivery of Telegauge units to various orders during 1928. | 11th Jan 1928 | Box 44 \ 3 Scan149 | |
| Letter to H.M. Hobson Ltd. regarding a proposed 3-branch tank unit head casting. | 11th Jan 1928 | Box 44 \ 3 Scan150 | |
| Letter from H.M. Hobson Ltd. detailing the dispatch of tank units and air lines. | 14th Jan 1929 | Box 44 \ 3 Scan151 | |
| Letter explaining test findings and design considerations for a fuel pump and tank unit gauge system. | 14th Jan 1929 | Box 44 \ 3 Scan152 | |
| Technical memo discussing the design and performance of a pump, its efficiency, and mounting options. | 14th Jan 1929 | Box 44 \ 3 Scan153 | |
| The final page of a letter from H.M. Hobson, Ltd., signed by the Joint Managing Director. | 14th Jan 1929 | Box 44 \ 3 Scan154 | |
| Letter to H.M. Hobson Ltd. regarding the modification of gauges and the covering of unsightly pipes. | 14th Jan 1929 | Box 44 \ 3 Scan155 | |
| Instructions and advice regarding the correct usage of a Hobson Petrol Gauge. | 15th Jan 1929 | Box 44 \ 3 Scan156 | |
| Confirming payment for one gauge and another item, while disputing payment for a second gauge. | 16th Jan 1929 | Box 44 \ 3 Scan157 | |
| Letter to Major Searight regarding a parts shortfall for K.S.180 gauges and a payment dispute for K.S.155 gauges. | 16th Jan 1929 | Box 44 \ 3 Scan158 | |
| Continuation page of a letter mentioning running on the continent. | 16th Jan 1929 | Box 44 \ 3 Scan159 | |
| Letter from H.M. Hobson Ltd. regarding the design and modification of a 40/50 HP tank and gauge. | 16th Jan 1929 | Box 44 \ 3 Scan160 | |
| Letter from H.M. Hobson, Ltd. regarding a trial fitment of a unit and potential body interference. | 16th Jan 1929 | Box 44 \ 3 Scan161 | |
| Letter to H.M. Hobson Ltd. discussing K.S. tank and filter unit fitment, querying the insistence on a precise dashboard angle. | 17th Jan 1928 | Box 44 \ 3 Scan162 | |
| Requesting a scheme showing coachwork overhang to accommodate a K.S. Petrol Gauge unit and cover. | 17th Jan 1929 | Box 44 \ 3 Scan163 | |
| Letter from H.M. Hobson, Ltd. regarding the supply and despatch of replacement gauges and pumps. | 18th Jan 1929 | Box 44 \ 3 Scan164 | |
| Page two of a letter from H.M. Hobson, Ltd. regarding a credit note for a gauge and the performance of a K.S.180 set. | 18th Jan 1929 | Box 44 \ 3 Scan165 | |
| Moved back position of the K.S. Gauge on the tank in relation to the maximum body size. | 21th Jan 1929 | Box 44 \ 3 Scan166 | |
| Report request regarding K.S. petrol telegauge failures due to vapour condensation in specific weather conditions. | 21th Jan 1929 | Box 44 \ 3 Scan167 | |
| Correspondence with H. M. Hobson Ltd. regarding hand pumps, a tank unit, and a K.S. telegage. | 21th Jan 1929 | Box 44 \ 3 Scan168 | |
| Letter from H.M. Hobson Ltd. discussing a delay in designing a new top plate due to staff illness. | 22th Jan 1929 | Box 44 \ 3 Scan169 | |
| Letter from H.M. Hobson, Ltd. discussing angular tolerances and adjustments for a special gauge. | 22th Jan 1929 | Box 44 \ 3 Scan170 | |
| The receipt and testing of experimental gauge parts from Messrs. Hobson, and the associated covering order and price. | 23th Jan 1929 | Box 44 \ 3 Scan171 | |
| Letter from H.M. Hobson, Ltd. discussing the hand pump for the Hobson K-S Telegage. | 23th Jan 1929 | Box 44 \ 3 Scan172 | |
| Fuel gauge system discussing hand pumping, gauge lag, and different pump types. | 23th Jan 1929 | Box 44 \ 3 Scan173 | |
| Letter from H.M. Hobson, Ltd. discussing spring-loaded or positive pump options. | 23th Jan 1929 | Box 44 \ 3 Scan174 | |
| Letter from H.M. Hobson Ltd. regarding a discrepancy in a petrol tank gauge seating compared to drawing L.F.1220. | 26th Jan 1929 | Box 44 \ 3 Scan175 | |
| The second page of a letter from H.M. Hobson, Ltd. regarding the return of an item. | 26th Jan 1929 | Box 44 \ 3 Scan176 | |
| Disposal of two 40/50-HP Telegauges and one 20-HP ditto. | 26th Jan 1929 | Box 44 \ 3 Scan177 | |
| Querying the delivery status and completeness of an order for tank units and air lines from Messrs Hobsons. | 26th Jan 1929 | Box 44 \ 3 Scan178 | |
| Modifications to fuel tank gauges and units, and their suitability for production. | 23th Jan 1929 | Box 44 \ 3 Scan179 | |
| Letter to H.M. Hobson Ltd. enclosing a detail drawing of a 40/50 HP tank. | 1st Feb 1929 | Box 44 \ 3 Scan180 | |
| Design, sourcing, and features of a framed instrument panel. | 5th Feb 1929 | Box 44 \ 3 Scan181 | |
| Letter from H.M. Hobson, Ltd. acknowledging receipt of a letter and a drawing for a 40/50 HP tank. | 5th Feb 1929 | Box 44 \ 3 Scan182 | |
| Letter from H.M. Hobson Ltd. confirming the return of a modified petrol tank fitted with a three-connection unit and cover. | 7th Feb 1929 | Box 44 \ 3 Scan183 | |
| Letter from H.M. Hobson, Ltd. concerning the arrangement of pump set connections. | 7th Feb 1929 | Box 44 \ 3 Scan184 | |
| The design of the SS Instrument Board, including incorporating a K.S. gauge and changing dial colours to meet sales feedback. | 12th Feb 1929 | Box 44 \ 3 Scan185 | |
| Revisions to framed instruments, modifications to the K.S. gauge, and changing the outer frame material to brass. | 1st Feb 1929 | Box 44 \ 3 Scan186 | |
| The telegage for the 40/50 HP 'J2' series chassis, advising that parts cannot be ordered pending final design modifications. | 30th Mar 1929 | Box 44 \ 3 Scan187 | |
| Standardization and operation of the K.S. petrol gauge on the first 50 SS chassis. | 1st Mar 1929 | Box 44 \ 3 Scan188 | |
| Fuel tank gauge, detailing production points and requesting a drawing. | 24th Sep 1928 | Box 44 \ 3 Scan189 | |
| Progress on various vehicle modifications including shock dampers, exhaust systems, and couplings. | 19th Jan 1929 | Box 44 \ 3 Scan190 | |
| Letter from H.M. Hobson Ltd. regarding the trial of a gauge with an auxiliary hand pump device. | 2nd Mar 1929 | Box 44 \ 3 Scan191 | |
| Letter from H.M. Hobson Ltd. regarding a cover for a tank unit and an experimental pump sample. | 4th Mar 1929 | Box 44 \ 3 Scan192 | |
| Despatch of a petrol pipe cover to H.M. Hobson Ltd. | 1st Mar 1929 | Box 44 \ 3 Scan193 | |
| Letter to H.M. Hobson Ltd. regarding modifications to a pump and tank gauge, and the sending of a cover for pipes. | 5th Mar 1929 | Box 44 \ 4 Scan001 | |
| Letter from H.M. Hobson, Ltd. to W.A. Robotham regarding a sample pump and the return of a pipe cover. | 6th Mar 1929 | Box 44 \ 4 Scan002 | |
| Letter from H.M. Hobson Ltd. regarding a drawing for a tank unit and a sample hand pump. | 8th Mar 1929 | Box 44 \ 4 Scan003 | |
| Page 2 of a letter from H.M. Hobson Ltd. regarding modifications to a pump design. | 8th Mar 1929 | Box 44 \ 4 Scan004 | |
| Sketch showing the position of a pump type top plate casting on a 21-gallon petrol tank. | 8th Mar 1929 | Box 44 \ 4 Scan005 | |
| Letter to H.M. Hobson Ltd. acknowledging receipt of a hand pump and requesting additional parts for a 40/50 HP car. | 11th Mar 1929 | Box 44 \ 4 Scan006 | |
| Internal request to order a dashboard air pump and a triple air line for a K.S.180.P. petrol gauge from Messrs. H. M. Hobson. | 1st Jan 1929 | Box 44 \ 4 Scan007 | |
| Internal enquiry seeking specifications for ordering K.S. Telegauges for the 20-HP Chassis 'O' Series. | 12th Mar 1929 | Box 44 \ 4 Scan008 | |
| Letter to Messrs. H.M. Hobson Ltd. confirming receipt of a second dashboard air pump. | 12th Mar 1929 | Box 44 \ 4 Scan009 | |
| Letter from H.M. Hobson Ltd. regarding a triple air line for a 40/50 HP car and a query about a mistaken second dashboard pump. | 13th Mar 1929 | Box 44 \ 4 Scan010 | |
| Page 2 of a letter from H.M. Hobson, Ltd. regarding a previous despatch. | 13th Mar 1929 | Box 44 \ 4 Scan011 | |
| Letter to Messrs. H.M. Hobson Ltd. regarding being misinformed about a pump and requesting a second one. | 14th Mar 1929 | Box 44 \ 4 Scan012 | |
| Request to order a second dashboard air pump for the K.S. Telegage from Messrs. Claudel Hobson Ltd. for use as a model. | 14th Mar 1929 | Box 44 \ 4 Scan013 | |
| The telegage for the 20 HP Chassis 'O' Series. | 15th Mar 1929 | Box 44 \ 4 Scan014 | |
| Request for liquid for K.S. Telegage dash units. | 18th Mar 1929 | Box 44 \ 4 Scan015 | |
| Instructions to order K.S. Telegauges for the 40/50-HP 'J2' Series chassis. | 19th Mar 1929 | Box 44 \ 4 Scan016 | |
| Letter from H.M. Hobson Ltd. confirming the despatch of a second pump. | 22th Mar 1929 | Box 44 \ 4 Scan017 | |
| Two unpaid invoices from H.M. Hobson Ltd. for which no official orders exist. | 25th Mar 1929 | Box 44 \ 4 Scan018 | |
| Correspondence concerning a failed petrol tank gauge and its replacement for Chassis 17-EX owned by the H.H. Maharajah of Kashmir. | 25th Mar 1929 | Box 44 \ 4 Scan019 | |
| Letter from H.M. Hobson Ltd. regarding the enclosure of prints for a tank unit cover. | 26th Mar 1929 | Box 44 \ 4 Scan020 | |
| Order for a K.S. petrol gauge for chassis 17-EX, owned by the Maharajah of Kashmir. | 26th Mar 1929 | Box 44 \ 4 Scan021 | |
| Request to H.M. Hobson Ltd. for replacement gauges and hand pumps due to issues with original parts in India. | 26th Mar 1929 | Box 44 \ 4 Scan022 | |
| Confirming items for chassis No. 24-EX 'SS' car require payment. | 26th Mar 1929 | Box 44 \ 4 Scan023 | |
| Obtaining a Telegage for chassis 17-EX for the Maharajah of Kashmir. | 26th Mar 1929 | Box 44 \ 4 Scan024 | |
| The guarantee of accuracy for Telegauges supplied by Messrs. H.M. Hobson Ltd. | 27th Mar 1929 | Box 44 \ 4 Scan025 | |
| Letter to H.M. Hobson Ltd. regarding the development and testing of fuel gauges and pump units for 20 HP and 40/50 HP cars. | 27th Mar 1929 | Box 44 \ 4 Scan026 | |
| Telegage memo discussing the standardisation of gauges for the S.S. and 20 HP models, including details on tank covers and installation. | 27th Mar 1929 | Box 44 \ 4 Scan027 | |
| Requesting a fully dimensioned detail drawing of a top plate casting from Hobsons for petrol tank gauges. | 28th Mar 1929 | Box 44 \ 4 Scan028 | |
| Letter from H.M. Hobson, Ltd. regarding the manufacture of a complete telegage with triple air line and pump. | 28th Mar 1929 | Box 44 \ 4 Scan029 | |
| Letter from H.M. Hobson, Ltd. acknowledging a letter and drawings, and discussing the checking of installations on production tanks and chassis. | 4th Apr 1929 | Box 44 \ 4 Scan030 | |
| Letter from H.M. Hobson, Ltd. discussing gauge installation, pump performance, and petrol vaporization. | 4th Apr 1929 | Box 44 \ 4 Scan031 | |
| Extract from a letter detailing a fault with a petrol gauge and an investigation into its cause. | 6th Apr 1929 | Box 44 \ 4 Scan032 | |
| Diagrams illustrating the effect of vehicle movement on a petrol and fluid system. | 8th Apr 1929 | Box 44 \ 4 Scan033 | |
| Letter to H.M. Hobson Ltd. about a problem with a telegage on a 40/50 HP car being run at high speeds. | 8th Apr 1929 | Box 44 \ 4 Scan034 | |
| Investigation into a malfunctioning petrol gauge where petrol is mixing with the gauge's indicator liquid. | 6th Apr 1929 | Box 44 \ 4 Scan035 | |
| Diagrams illustrating the operation of a petrol tank's air vent and balance pipe system. | 9th Apr 1929 | Box 44 \ 4 Scan036 | |
| Letter requesting a more detailed drawing or a model for K.S. Telegauges from Messrs Hobson Ltd. | 9th Apr 1929 | Box 44 \ 4 Scan037 | |
| Requesting confirmation on the accuracy guarantee for Hobson Company Telegages on 20 HP and 40/50 HP chassis. | 9th Apr 1929 | Box 44 \ 4 Scan038 | |
| Letter to H.M. Hobson Ltd. acknowledging their explanation of a problem with a car in France for Major Searight's attention. | 11th Apr 1929 | Box 44 \ 4 Scan039 | |
| Letter to H.M. Hobson Ltd. regarding a failed glass tube on a dashboard instrument and a suggestion for an improved joint. | 22th Apr 1929 | Box 44 \ 4 Scan040 | |
| Inquiry regarding the delivery status of a K.S. Telegauge for Chassis 17-EX, for the H.H. Maharajah of Kashmir. | 23th Apr 1929 | Box 44 \ 4 Scan041 | |
| From G.W.H. to Mr Pope confirming receipt and status of a Telegauge. | 23th Apr 1929 | Box 44 \ 4 Scan042 | |
| Letter from H.M. Hobson Ltd. discussing a recurring fault with an instrument's glass tube. | 23th Apr 1929 | Box 44 \ 4 Scan043 | |
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