After the trial of an action has been commenced, depositions cannot ordinarily be taken, and especially not after the argument has been closed, except by-leave of court specially obtained, for good cause shown. Courts have, however, exercised their discretion and allowed depositions to be taken after the close of plaintiff's case, where warranted by special circumstances. They have been allowed where the defendant omitted to plead and after a decree pro confesso had been entered against him. After a final determination of the action, depositions cannot be taken.

18 Glenn vs. Hunt, 120 Mo., 330.