I can't imagine this man was not a gangster, or at least a swindler of some sort, and her certainly looks like a smug cat with a canary in his belly! First quarter of the 20th century British and unused and done in black ink with a little blue (with white polka dots!) for the shirt collar. I haven't been able to find out anything about the Ted Cross who signed it, but would guess he drew more than one postcard!
There's a large ink smear to the left of his arm and smaller stains all over, bumping to the corners and a fold to the lower right one. Still, a great drawing of a memorable character! 3 1/2" x 5 1/2".