The Naval Career of John William ARMSTRONG (1792 - 1857)

What we know about John William ARMSTRONG naval career is based entirely on three Royal Navy Discharge Certificates and his death certificate.
The discharge certificates are from:

1. HMS Spencer 20 December 1807 - 9th June 1809
2. HMS N???????? 29 July 1809 - 30 March 1812
3. HMS Queen - 26 September 1814 - 30 December 1815 (see above)

His death certificate records his place of death as Greenwich Hospital (the hospital established for serving and retired naval personnel), London.
John would have been 17 when he served on HMS Spencer so it is possible he served on some other ship before this date. His discharge from HMS Queen in 1815 was on the reduction of the Royal Navy at the end of the Napoleonic Wars but whether John served on any other ships after this is not known. In 1840 when he was 48 his occupation was recorded as comb maker.