If you google Schofield Woolen mills you should be able to come up with some info on them.
I did so and found an old photo of the building and a note that says the factory was built in 1872 and later purchased by J. Schofield in 1892 when he incorporated Schofield Woolen Co.
This was in Oshawa, Ontario - Oshawa is in Ontario County, Ontario
From this I went to Canada census to see if I could find a J. Schofield in Oshawa
1901OSHAWA, ONTARIO SOUTH, ONTARIO
John A.,age35, woolen manufacturer, born Feb. 1, 1866, England, immigrated 1869
Margaret A., wife, age 36, born March 17, 1865 Ontario
Ada, age 7, daughter born June 28, 1893 ON
Agnes, age 6, daughter, born March 25, 1895 ON
Muriel M., age 2, daughter, born Feb. 9, 1899 ON
Queenie E., age 3 months, daughter, born Jan. 10, 1901 ON
there is another Schofield family in Oshawa - possibly parents of John ??
John, age 71, manufacturer, born Aug. 27, 1829 England
Emma, age 45, wife, born Aug. 26, 1855 ON
Melton, son, age 21, born Sept. 19, 1879 ON
Charlie, age 18, son, born Aug. 25, 1882 ON
I found the family in 1891 census and a son John is with them so seems to match
1891 BRANTFORD CITY, BRANT SOUTH, ONATIO
Jonathan, age 51, manufacturer, born England parents born England
Sarah, age 40, wife, born England
John, age 24, son, knitter, born England
Milton, age 11, son, born England
Charles, age 8, son, born England
so in this one Milton and Charles are shown as born England while in 1901 they are shown born ON- also father John aged by 20 years between 1891 and 1901 - and John is shown a single, not widowed but that could be an error
I found his marriage to Ada Margaret Walton - they married Aug. 31, 1891 Paris, Brant, Ontario - he son of Jonathan Schofield and Agnes Dent
John born Liverpool, England
he is shown as a bachelor
You did not give the name of the Schofield man who was father to your gg-grandmother so I am not sure that this John is the right one, but he is shown as a woolen manufacturer and is in right place.
So, before I go further can you tell me when Sarah Jane was born and where?
what was her mother's name?
Could it be that her father was the elder John/Johnathan?