Bradford_2_1 is a variation of a two deck Klondike. This game 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. But you only get one time through the hand. Harp is a slightly easier varient of this game, while our own Klondike_2_1 is more challenging.