We have nothing recorded as from the Canon for this date, so I felt that a limerick for this story from the author of the source book I use for daily occurrences in the Cannon would fit in well here.
The Adventure of the Sussex Vampire
The Babe’s mother sucked blood from his neck,
Of her Husband it made quite a wreck.
Jacky poisoned the child,
So young Jack was exiled
To a whole year at sea, what the heck!
William S Dorn, BSI, DWNP
Just a random thought: How would a year at sea and before returning to the family have cured young Jacky of his hatred for his stepbrother? What would have cured him?