Samuel Adams as Moritz Weissmann and Ella Stevens as Lexa Kluger in a scene from the Mint Theater Company's production of the American premiere of Sally Carson's "Crooked Cross" at Theatre Row (Photo credit: Todd Cerveris) Sally Carson's only play Crooked Cross (1935) now being given its American premiere by the Mint Theater has an interesting history. In the early thirties, Carson, a publisher's reader in England, t…