1794 Royal Gazette, Kingston, Jamaica
Died, In Spanish Town, Miss Margaret L. Gordon and Mrs. PRYOR, widow of the late Lieut. John Pryor, of the 20th dragoon
(Further record of John Pryor… 

War Office, July 6th, 1792 –  Quartermaster —- Pryor, from the 16th Regiment of light dragoons, cornet. The Observer London July 8th 1792

London Gazette of Saturday September 22nd, War office  20th Regiment of light dragoons, James Grant, Ghent. To be Coronet, without purchase, Vice John Pryor, promoted. The Waterford Herald (Ireland), Oct 2, 1792)