Since your adding Seren Olsen to your family tree, I figure I'd give you a few hints...
Seren Olsen died in Springhill, Nova Scotia on Nov 26 1828 of heart diease.
His wife's name was Sarah Olsen (born Lockhart) she was the daugther of she was born April 17 1873 in Stellarton, Nova Scotia, (Which is next to New Glasgow) they married on Dec 20 1893 in Springhill, N.S. She died on Jan 21 1966 in Springhill, N.S.
She was a midwife and children's aid worker. Seren worked in the mines in Springhill for "most" of his life. and they had 4 boys and 4 girls ( that I know of ) their names where Annie E, John W, Inga May, Orville Raymond, Agnes Lorraine, Ralph Ashbrook, Grace Lenora, and Seren Alexander.
thanks again Harald