9 June 1794 In England.
10 June 1794 Commissioned Physician to the Forces aged 26 years. Served in Lisbon and the Mediterranean.
12 Nov 1794 Physician to the Forces at Corsica.
4 Apr 1800 Inspector of Hospitals at a daily rate of pay of 30 shillings. Franck was appointed head of the Medical Services in the Mediterranean on the recommendation of Sir Charles Stuart with the intention of serving under Stuart. When Stuart resigned his commission, Franck served under Sir Ralph Abercrombie, the new Commander-in-Chief of the Army in the Mediterranean.1
Dec 1800 Principal Medical Officer to Abercrombie's Expedition to Egypt. Established the plague hospital at Aboukir. Frank believed the plague to be highly contagious. He thought that it was due to a specific contagion which was brought into action by some particular constitution of the air.
Jan 1801 Superseded by Inspector of Hospitals Thomas Young at Marmorice, although Franck remained with the Expedition.
2 Mar 1801 Part of the medical staff at Aboukir.
Malta Oct 1801 Returned to Malta from Egypt.
Malta Jan 1802 Left Malta.
24 June 1802 Reduced to half-pay.
20 July 1805 War Office letter dated 20 July 1805: "I am instructed by the Secretary-at-War to transmit to you for the consideration of HRH The Commander-in-Chief the enclosed letter from Mr Francis Knight, accompanying one for the Physician General, relative to Dr Franck Inspector of Hospitals, and stating that the doctor has by order of HRH been relieved from his tour of Foreign Service in consideration of his employment at the Board of Health, and that as this may be served as a tour of military duty, Mr Knight thinks his claim to full-pay not ill founded".
27 July 1805 War Office letter dated 27 July 1805: "I have the Secretary-at-War directions to transmit for the consideration of HRH The Commander-in-Chief the enclosed letter from the Inspector General of Regimental Hospitals recommending that Dr Franck, Inspector of Hospitals, may be placed on full-pay in consequence of his employment at the Board of Health".
1 Aug 1805 Returned to full-pay with rank of Inspector.
25 Dec 1806 Half-pay.
17 Apr 1808 Served in The Peninsular War as PMO Lisbon, and was present at Fuentes D'Onor and Albuhera.
20 May 1809 "The Transport Board has stated that the two horses of Inspector of Hospital Dr Franck may embark at Ramsgate with a troop of Horse Artillery about to proceed to Portugal".1
26 May 1809 "The Surgeon-General having represented that the service of Dr Frank now waiting at Portsmouth for an opportunity to proceed to Lisbon are urgently required at Oporto, I have the Secretary at War direction to request you will be pleased to provide him with immediate passage to Oporto on board any ship now under despatch to that place".2
30 Oct 1811 Became ill while serving in the Peninsula under the Duke of Wellington. Was succeeded by Inspector of Hospitals James McGrigor as Principal Medical Officer.
25 Oct 1812 Retired to half-pay with an allowance equal to his full-pay.
25 Oct 1815 Returned to full-pay.
27 Jan 1843 Died in Hertford Street, Mayfair in his 75th year.