What is Ticket Of Leave?

Legal Definition
A ticket of leave was a document of parole issued to convicts who had shown they could now be trusted with some freedoms. Originally the ticket was issued in Britain and later adopted by the United States, Canada and Ireland.
-- Wikipedia
Legal Definition
In English law. A license or permit given to a convict, as a reward for good conduct, particularly in the penal settlements, which allows him to go at large, and labor for himself, before the expiration of his sentence, subject to certain specific conditions and revocable upon subsequent misconduct.
-- Black's Law Dictionary
Legal Definition
Probation granted a convict under which he is entitled to go at large.
-- Ballentine's Law Dictionary