Hello there Melvin, I'm still doing research on the Smailes family. Isabel was my Great-great grandmother and a sister to Dorothy amongst others. One brother was a master boot maker in Sunderland another owned a grocery and provisions shop in Stockton another sister married a brickbuilder in Ripon. There are a few missing record missing but it's getting there slowly. So William and Mary Jane are my great great great grandparents. There are still Denham's in Darlington who have a haulage firm .I am keen to know more about Henry Edwin Smailes and Elizabeth Jane Smailes. Best wishes to you and your family from Yvonne Friel and family.