Andrew
Just noticed we have a date conflict on Jessie.
The records we have state Jessie was born 21May 1976 on the way to Japan. This date is verified by the 1901 census when she is recorded as aged 24 however, you have Jack not leaving the lighthouse service until 1878 to go to Japan!
On the records passed to me by the Australian decendants of Helen there was another brother James on whom we have very little information. You don't think there is some confusion between the two brothers in view of the date conflict above?