See Sobol, supra, at pages 11-12. The decision in Lowe v. Sory, 107 Colo. 341, 111 P.2d 1054 (1941), although the mortgage analogy wasn't evoked and a period to redeem not prayed for, further illustrates the type of situation in which forfeiture has been upheld. The plaintiff sold land to defendant retaining title to himself.