a bleachfield is a huge building on the side of a river where linen and cotton were washes by machines It was on "tramps", large and high poles driven trough the water till the ground on the bottom of the river. For country people used to see one floor houses it was the biggest thing they could imagine to decribe the tall height of jock mcgraw, " a bleachfield oot on tramp" like bleachfield yet very big and notsoever out on the "tramps" the poles