Sprot deponeth that he entered himself thereafter in conference.
State Trials(1606).
De*pone", v. i. To testify under oath; to depose; to bear witness. [A Scotticism]
The fairy Glorians, whose credibility on this point can not be called in question, depones to the confinement of Merlin in a tree.
Dunlop.
De*po"nent (?), n. [L. deponenes, -entis, laying down. See Depone, v. t.] 1. (Law) One who deposes or testifies under oath; one who gives evidence; usually, one who testifies in writing.