I have the edition of the book entitled "Children of the Sea", published by Tuckwell Press.  On page 202, in the the list of those lost on the Guiding Star, is:-
"THOMAS FISHER, aged 30.  Left a widow who gave birth to Thomasina Fisher on 16 December 1881.  Their other dependent children were William, Alice, Janet, Elizabeth and Ann."
There was also a Robert Fisher lost on the Beautiful Star - he was aged 24.  "No noted dependents." (page 200)
Lizci