Keith, glad to be of help.
The letter is certainly readable. Thanks for posting. No.814 Sqn was the 'attack' half of the 15th Carrier Air Group onboard Venerable. After WWII, that ship was first sold to The Netherlands as the second Karel Doorman (HMS Nairana, which also features in the thread, was the first) and then, in Oct 68, to Argentina, as the Veinticinco de Mayo.
No. 1851 Sqn wore the "R6" codes between July 1945 and February 1946. It transferred to HMS Vengance in June 1946 for its journey back to the UK and disbanded at Devonport on 13 August 1946.