Harp is mentioned as an option in the original Klondike game description in Hoyle. 

This game uses two decks, adds more table columns, but compensates by flipping one card at a time from the hand to the talon and only allowing single card transfers. Harp has fewer tables to work with than similar Bradford, but it compensates with two rotations back to hand.  Bradford is a slightly harder varient of this game. Our own Klondike_2_1 is a more even challenging game due to the fewer tables.