Jack's year of birth

[esteven]

Jack was taller than Queenie and far more than twice as heavy; and having been in the wars for a great while and much battered, he now looked older. He was in fact seven years her junior, and there had been a time when he was a very little boy whose ears she boxed for impertinence, uncleanliness and greed, and whose frequent nightmares she would soothe by taking him into her bed.

(chapter one)
Queenie is Hester Maria Elphinstone, Viscountess Keith, born in 1764.