Do you have his wifes burial, could he have been interred with her
If his parents are alive in 1911 you could check number of children who have died to see if he is still alive at that point.
You're being a bit mysterious about who his wife was!Was she "Elen" Lee 22 b Liverpool, in 1901?
So he must have married young if he was widowed in 1901 - how old was his wife when she died?
OK so the baby was Nellie Lee, mother's maiden name Flynn, born & died Jun qtr 1901 Holborn.And I see that Henry John Lee fibbed about his age when he married "Helen" Flynn in Hackney on 4 Nov 1900. He claimed to be 28 & Helen 21.