I ordered the death certificates for the two Henry Sinclairs who died in Liverpool in 1838. They reveal that the one who was aged 68 is quite possibly the spouse of Elinor Cretney. Details:-
Death registered Islington District of Liverpool. Died Jan 22nd, Shaw's Barn. Age 68 yrs. Profession Blacksmith. Informant; William Sinclair, Blacksmith, Wakefield St , Son. This William could be the child of Henry Sinclair and Elinor Cretney who was baptised in St Matthews Braddan 18/9/1797.
I have been frustratingly unable to locate William in any 1841 online census, but there is a possible candidate for him in 1861 census for IOM - a William Sinclair, widower, age 63, born Douglas, man servant to the Hampton family in Braddan parish.
The remaining children of Henry and Elinor also remain stubbornly elusive:- Thomas #1 1799,David 1802, James 1804, Elinor 1806, Thomas#2 1809, John 1812, Elizth 1814, and George 1816.
The other Henry Sinclair who died in 1838 in the workhouse , aged 45 , was a Mariner , eliminating any possibility that he was the Henry , spouse of Ann Gray who almost certainly remarried to Elizabeth Williams 13/11/1837 and whose son Henry married Elizabeth Harris 24/10/1836
Matt