Dear Pirhana,
The 1901 Census lists a property at 46, Morpeth Street, St. Andrew with the following occupants:-
Peter (41) Cabinet Maker (Born in Edinburgh) Maria (42 Born in Edinburgh) / Frederic (16) Pit Lad / Florence (12) / Jane (9) / Peter (7) / Mable (5) / Mary (3) / Jessie (1).
In the 1911 Census the family were at 31 Hunters Road, both parents and five daughters, plus a son William (born in 1904). Frederic and Peter (the son!) were not listed.
Cannot be certain whether Peter (son) married but I carried out a search of the marriage records for Northumberland between the years 1910 to 1921 and came across the following entry :
1916, Tynemouth Registration District, Peter H. Ferguson married Thomasine L. Hastie.
This might be "your" Peter.
Regards,
Fifthwheel.