Annie Loster -d. 1970's Balcarres, Sask

Hello,
I am trying to find information about husbands grandmother Annie Loster who lived in Balcarras, Sask. for some time. We are told that she died in the 1970's and was in her 90's. She died in the Balcarras Hospital and is buried in a cemetery in the Balcarras area. Annie lived alone her husband died in 1905 in Phoenix, B.C. in a mining accident leaving her with 4 small children Andrew, Edward, Frank & Isabele. Her maiden name was Briar, Brier, Byer, Bryer not sure of spelling. Trying to locate any of her relatives that may have lived or are living in the area.

Thanks
Sheri