| Description | Date | Identifier | |
| Letter to Messrs. Joseph Lucas Ltd requesting to try out a 12-volt Bosch High Frequency Electric Horn. | 18th Jan 1932 | Box 59 \ 3 Scan141 | |
| Obtaining a substitute Lucas horn for a 40/50 chassis test due to delays with a sample Lucas-Bosch horn. | 21th Jan 1932 | Box 59 \ 3 Scan142 | |
| Correspondence regarding a sample Lucas type HF.415 Alto Horn with a chromium-plated 'Grille' front. | 22th Jan 1932 | Box 59 \ 3 Scan143 | |
| The correct naming convention for a new high-frequency horn from Joseph Lucas Ltd to avoid trademark issues with Bosch. | 26th Jan 1932 | Box 59 \ 3 Scan144 | |
| Cancellation of a sample request for a Lucas H.F. Alto Horn. | 27th Jan 1932 | Box 59 \ 3 Scan145 | |
| The forwarding of a Lucas H.F. Alto Horn to Derby. | 28th Jan 1932 | Box 59 \ 3 Scan146 | |
| Transfer and credit for a second-hand Lucas alto horn. | 25th Feb 1932 | Box 59 \ 3 Scan147 | |
| Required accessories for the first J.3. Enclosed Limousine. | 25th Feb 1932 | Box 59 \ 3 Scan148 | |
| Testing and fitting of a new Special Lucas high frequency horn, model HF.722. | 27th Feb 1932 | Box 59 \ 3 Scan149 | |
| Testing and mounting of new Lucas H.F. electric horns, comparing them to Bosch horns. | 7th Feb 1932 | Box 59 \ 3 Scan150 | |
| Request to obtain a Lucas high frequency horn, type H.F.722, for chassis 19-EX. | 9th Mar 1932 | Box 59 \ 3 Scan151 | |
| Requesting a modified bracket to mount a special H.F. horn onto the front of chassis 19-EX. | 9th Mar 1932 | Box 59 \ 3 Scan152 | |
| Confirming the return of a Lucas HF Alto horn to the makers for readjustment. | 18th Mar 1932 | Box 59 \ 3 Scan153 | |
| Letter to Joseph Lucas Ltd. regarding the testing and feedback on the Lucas 'Alto' horn type HF.722. | 22th Mar 1932 | Box 59 \ 3 Scan154 | |
| Comparing a Klaxon High Frequency horn with a Lucas Alto horn and requesting one be fitted to a test car. | 22th Mar 1932 | Box 59 \ 3 Scan155 | |
| Requesting to obtain a sample of a Klaxon H.F. horn for testing purposes. | 23th Mar 1932 | Box 59 \ 3 Scan156 | |
| The despatch of a Lucas HF.722 Alto Horn to Sales. | 23th Mar 1932 | Box 59 \ 3 Scan157 | |
| The trial of a new Lucas HF Alto horn and obtaining a Klaxon horn for testing. | 23th Mar 1932 | Box 59 \ 3 Scan158 | |
| Replacement of an unsatisfactory Klaxon horn with a preferred Lucas horn. | 4th Apr 1932 | Box 59 \ 3 Scan159 | |
| Fitting and testing of Lucas and Klaxon electric horns. | 4th Apr 1932 | Box 59 \ 3 Scan160 | |
| Requesting particulars of a new electric high-frequency horn for potential use on their chassis. | 5th Apr 1932 | Box 59 \ 3 Scan161 | |
| The approved mounting position for horns on the front of cars. | 6th Apr 1932 | Box 59 \ 3 Scan162 | |
| Development, production, and testing of new Lucas electric horns (type HF.722). | 6th Apr 1932 | Box 59 \ 3 Scan163 | |
| The fitting of a new horn and modification of the starter switch on model 58-GN. | 3rd Apr 1932 | Box 59 \ 3 Scan164 | |
| Returning a Klaxon HF5 electric horn and ordering a Lucas HF.722 horn for a specific car. | 20th Apr 1932 | Box 59 \ 3 Scan165 | |
| Mounting schemes and tests for a new Lucas electric horn. | 2nd May 1932 | Box 59 \ 3 Scan166 | |
| The replacement of Klaxon type electric horns with new Lucas H.F. 722 horns. | 4th May 1932 | Box 59 \ 3 Scan167 | |
| Policy on electric horns, ceasing purchase of Klaxon type and accommodating the new Lucas H.F. 722 horn. | 4th May 1932 | Box 59 \ 3 Scan168 | |
| The standardization of horns by fitting a Lucas horn to a chassis. | 5th May 1932 | Box 59 \ 3 Scan169 | |
| Instructions for fitting two Lucas electric horns to chassis 19.G.4 and retaining the original Klaxon horn. | 13th May 1932 | Box 59 \ 3 Scan170 | |
| Order request for a Lucas H.F. 722 electric horn for chassis 20-EX. | 19th May 1932 | Box 59 \ 3 Scan171 | |
| Internal request to obtain two Lucas Electric Horns, type HF.722, for order numbers 54856 and 54870. | 28th May 1932 | Box 59 \ 3 Scan172 | |
| Standardisation of Lucas horns for the 20/25 HP Chassis 'V' series. | 13th Jun 1932 | Box 59 \ 3 Scan173 | |
| Order request for a Lucas HF.722 horn for chassis 19-EX. | 17th Jun 1932 | Box 59 \ 3 Scan174 | |
| Schemes for mounting new high-frequency electrical horns on a chassis. | 18th Jun 1932 | Box 59 \ 3 Scan175 | |
| Letter to Joseph Lucas Co. Ltd. about experiments with sounding two Lucas Horns together to double the power. | 20th Jun 1932 | Box 59 \ 3 Scan176 | |
| The 'beat' note for chassis electrical horns, discussing placement issues and a potential design for a lighter twin-diaphragm horn. | 22th Jun 1932 | Box 59 \ 3 Scan177 | |
| Expense and practicality of mounting two synchronized electrical horns versus a single Lucas horn. | 23th Jun 1932 | Box 59 \ 3 Scan178 | |
| Letter to Joseph Lucas Ltd. suggesting a new dual electro-magnetic horn design to save cost, weight, and space. | 24th Jun 1932 | Box 59 \ 3 Scan179 | |
| Letter from Joseph Lucas Research Laboratories regarding difficulties encountered in the development of a two-note horn assembly. | 1st Jul 1932 | Box 59 \ 3 Scan180 | |
| Suggestion to Messrs. Lucas for a dual-sound electric horn system. | 4th Jul 1932 | Box 59 \ 3 Scan181 | |
| Electrical specifications for the Lucas HF Horn No. HF.722. | 7th Jul 1932 | Box 59 \ 3 Scan182 | |
| Test report comparing the audibility of Lucas High Frequency and Klaxon motor-driven horns. | 7th Jul 1932 | Box 59 \ 3 Scan183 | |
| Vibration and sound issues related to horn mountings on the Japan and Peregrine car models. | 12th Jul 1932 | Box 59 \ 3 Scan184 | |
| Test results for a Lucas H.F. electric horn, noting its pitch and frequency compared to experimental models. | 12th Jul 1932 | Box 59 \ 3 Scan185 | |
| Internal request to order one Lucas HF.722 electric horn with a chromium finish for chassis 19.G.IV. | 13th Jul 1932 | Box 59 \ 3 Scan186 | |
| Investigation into a bad sound produced by a standardized horn mounting on certain car models. | 14th Jul 1932 | Box 59 \ 3 Scan187 | |
| Provision of a Lucas Alto Horn type F.H.722 for Chassis 19.G.1V. | 21th Jul 1932 | Box 59 \ 3 Scan188 | |
| Vibration issues in high-frequency horn mountings and suggested solutions. | 2nd Aug 1932 | Box 59 \ 3 Scan189 | |
| Copy of a letter regarding the fitting of a Lucas horn and the repositioning of the existing Bosch horn. | 26th Aug 1932 | Box 59 \ 3 Scan190 | |
| Price comparison for standardising a dual horn system on the 40/50 model. | 30th Aug 1932 | Box 59 \ 3 Scan191 | |
| Standardisation of a Lucas Horn (HF-722) fitted under the front apron. | 13th Jun 1932 | Box 59 \ 3 Scan192 | |
| Form for the standardization of a front fork part for 'V' Series chassis. | 29th Jul 1932 | Box 59 \ 3 Scan193 | |
| Standardisation report for fitting a Lucas horn under the front apron. | 9th Jun 1932 | Box 59 \ 3 Scan194 | |
| Form for the standardisation of chassis parts, detailing the replacement of Klaxons. | 9th Jun 1932 | Box 59 \ 3 Scan195 | |
| Blueprint for a bracket to mount Lucas high-frequency horns on headlamp pillars. | 1st Sep 1932 | Box 59 \ 3 Scan196 | |
| Requesting the return of a Lucas horn HF722 to the manufacturer for examination. | 1st Sep 1932 | Box 59 \ 3 Scan197 | |
| Letter to Joseph Lucas Ltd. regarding a faulty Lucas HF722 horn. | 1st Sep 1932 | Box 59 \ 3 Scan198 | |
| Letter from Joseph Lucas Limited concerning the testing and performance of a returned Alto Horn. | 15th Sep 1932 | Box 59 \ 3 Scan199 | |
| The second page of a letter from Joseph Lucas Limited. | 15th Sep 1932 | Box 59 \ 3 Scan200 | |
| Order for 5 Lucas HF.722 electric horns for the Peregrine Chassis. | 23th Sep 1932 | Box 59 \ 3 Scan201 | |
| Sending a Lucas HF.722 horn to be converted to a detuned type for a dual horn arrangement. | 23th Sep 1932 | Box 59 \ 3 Scan202 | |
| Instruction to transfer five Lucas Horns between departments. | 24th Sep 1932 | Box 59 \ 3 Scan203 | |
| The return of Lucas horns for a Peregrine chassis to be tuned as a dual arrangement. | 3rd Oct 1932 | Box 59 \ 3 Scan204 | |
| The standardisation and new mounting position of two horns on the 'Phantom II'. | 5th Oct 1932 | Box 59 \ 3 Scan205 | |
| The standardisation of the dual high-frequency electric horn arrangement on the Phantom II chassis. | 5th Oct 1932 | Box 59 \ 3 Scan206 | |
| Production and inspection of dual high-frequency horns by Lucas. | 7th Oct 1932 | Box 59 \ 3 Scan207 | |
| Letter to Joseph Lucas Ltd. requesting proposals to lighten the weight of their electric horns for the 40/50 HP cars. | 7th Oct 1932 | Box 59 \ 3 Scan208 | |
| The despatch of two special chromium-plated horns for inspection. | 7th Oct 1932 | Box 59 \ 3 Scan209 | |
| Letter from Joseph Lucas Ltd. regarding the possibility of lightening HF.725 Electric Horns. | 11th Oct 1932 | Box 59 \ 3 Scan210 | |
| Query on the inspection and receipt of sample horns for a dual high-frequency arrangement. | 17th Oct 1932 | Box 59 \ 3 Scan211 | |
| Faulty Lucas horns for the Peregrine model, requesting a re-test and adjustment. | 19th Oct 1932 | Box 59 \ 3 Scan212 | |
| Instructions for fitting dual high frequency horns to a Barker Continental Saloon Trials car. | 21th Oct 1932 | Box 59 \ 3 Scan213 | |
| The unsatisfactory testing of high-frequency electric horns mounted under the apron, recommending against this method. | 24th Oct 1932 | Box 59 \ 3 Scan214 | |
| The use and fixing of two de-tuned high-frequency horns under the apron for high-speed cars. | 25th Oct 1932 | Box 59 \ 3 Scan215 | |
| Questioning the correct mounting position for high-frequency electric horns. | 29th Oct 1932 | Box 59 \ 3 Scan216 | |
| Correcting the positioning of high-frequency electric horns and discussing special chromium-plated horns. | 31th Oct 1932 | Box 59 \ 3 Scan217 | |
| The progress of fitting a pair of Lucas High Frequency Horns to a Barker Continental Touring Saloon. | 2nd Feb 1932 | Box 59 \ 3 Scan218 | |
| Requesting a covering order to debit the cost of special horns for the Peregrine I0,000 mile test car. | 11th Nov 1932 | Box 59 \ 3 Scan219 | |
| The standardisation of fitting Dual High Frequency Horns on 40/50 HP models. | 11th Nov 1932 | Box 59 \ 3 Scan220 | |
| Fitting or return of two Lucas chromium plated electric horns sent for approval. | 20th Dec 1932 | Box 59 \ 3 Scan221 | |
| Request to retain two Lucas chromium-plated electric horns fitted to the London Trials Car. | 22th Dec 1932 | Box 59 \ 3 Scan222 | |
| Proposal from Lucas for an improved 'Alto' Horn with options for Staybrite or Chrome Plated finishes. | 3rd Jan 1933 | Box 59 \ 3 Scan223 | |
| Review of a sample 'Improved Type Alto Horn' from Messrs. Lucas, noting fitting issues and suggesting design modifications. | 4th Jan 1933 | Box 59 \ 3 Scan224 | |
| New sample of an improved type Alto Horn, querying if the rim can be made from Staybrite instead of chromium, and noting a fitment issue. | 4th Jan 1933 | Box 59 \ 3 Scan225 | |
| Disposal of an Alto Horn received from J. Lucas Ltd. | 6th Jan 1933 | Box 59 \ 3 Scan226 | |
| Requesting the relocation of horns on Peregrine Chassis No.5. | 6th Feb 1933 | Box 59 \ 3 Scan227 | |
| Confirming the scheme for fitting two horns to the Bensport and Peregrine chassis. | 13th Feb 1933 | Box 59 \ 3 Scan228 | |
| Letter from Joseph Lucas Ltd arranging a meeting concerning constant voltage equipment and regulator work. | 21th Feb 1933 | Box 59 \ 3 Scan229 | |
| Letter to Mr. E.A. Watson of Joseph Lucas Ltd. to arrange a meeting. | 22th Feb 1933 | Box 59 \ 3 Scan230 | |
| Letter to K.L.G. Sparking Plugs Ltd. arranging a meeting to discuss sparking plugs and screening caps. | 27th Feb 1933 | Box 59 \ 3 Scan231 | |
| Letter from Joseph Lucas Limited providing performance data for R.W. Screen Wipers. | 3rd Mar 1933 | Box 59 \ 3 Scan232 | |
| Concluding page of a letter from Joseph Lucas Limited to Rolls Royce. | 3rd Mar 1933 | Box 59 \ 3 Scan233 | |
| Letter to Klaxon Ltd. regarding bench tests on an electric windscreen wiper due to operational trouble. | 3rd Mar 1933 | Box 59 \ 3 Scan234 | |
| Wiper motor failure due to overheating, excessive current consumption, and component failure. | 6th Mar 1933 | Box 59 \ 3 Scan235 | |
| Fitting dual high-frequency electric horns to various chassis models. | 6th Mar 1933 | Box 59 \ 3 Scan236 | |
| Letter from Klaxon Ltd. acknowledging receipt of a communication and promising a full follow-up. | 6th Mar 1933 | Box 59 \ 3 Scan237 | |
| Letter to Joseph Lucas Ltd. discussing the unsuitability of their windscreen wipers for Rolls-Royce bodies. | 6th Mar 1933 | Box 59 \ 3 Scan238 | |
| Supplier quality issues, particularly with Lucas regarding windscreen wipers and lamps, and proposing alternative solutions. | 6th Mar 1933 | Box 59 \ 3 Scan239 | |
| Continuation page of a letter regarding a business meeting with Mr. Robinson of C.A.V. Co. | 7th Mar 1933 | Box 59 \ 3 Scan240 | |
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