From The Collaborative International Dictionary of English v.0.48:
Chance \Chance\, v. i. [imp. & p. p. Chanced; p. pr. & vb. n. Chancing.] To happen, come, or arrive, without design or expectation. "Things that chance daily." --Robynson (More's Utopia). [1913 Webster]
If a bird's nest chance to be before thee. --Deut. xxii. 6. [1913 Webster]
I chanced on this letter. --Shak. [1913 Webster]
Note: Often used impersonally; as, how chances it? [1913 Webster]
How chance, thou art returned so soon? --Shak. [1913 Webster]