From Ancestry.ca
Mary Ann Thompson, 18, b England, living Dysart, d/o Richard and Martha Thompson, married Stephen Wallis, 24, s/o William & Malenda Wallis, witn: James Orr & Jane Ann Thompson both of Dysart, 17 Dec 1879. Con 5 Lot 5 Dysart, Peterboro.
Haliburton has been crossed out and replaced with Peterboro.
John Thompson, 23, b Yorkshire England, living Minden, s/o Richard & Martha Thompson married Euphemia Bell, b Cannington, living Minden, d/o John Bell & Margaret Moore, witn: Susan Bell of Minden and John Beans of Dysart, 25 May 1878 Minden. Church of England.
Joseph Thompson, 20, b England, living Haliburton, s/o Richard and Martha Ann Thompson, married Elizabeth Jones, 17, b England, living Haliburton, d/o thos and Elizabeth Jones, witn:Elizabeth Jane Sawyer & ?? Bean both of Haliburton, 21 April 1873 Haliburton.
No marriage for Eliza. Census are only every 10 years so the next one would be 1891 and you indicate that they have left the area by then.
1891 census Qu'Appelle Assiniboie East Territories
THOMPSON
Ritchard, 62, England, farmer
Martha, 60, Eng
James, 34, Eng, hotel keeper, single
Wallis
Mary Ann, daughter, 29, Eng, cook, married
Mary Jane, gdaughter, 9, Ont
Thompson
Aline, 21, daughter, Ont
Harry, 9/12, grandson, NWT
No Eliza.
Richard, Martha and James are in Territories on 1901 census. Immigration date to Canada is 1853.
They all seemed to move out west but no sign of Eliza.