At the end of the indenture period, each boy was to be released from his apprenticeship with "a new suit of clothing in addition to his old, and a new Bible." And, if all went well, the young men would be able to go forth and establish their own businesses, benefitting from the hard years in service that they spent learning their trades. But not all situations necessarily turned out as planned; the contracts could be cancelled for a variety of reasons. The contract for Clark Martin, above, has a note written along the left side of the page that the agreement was "cancelled by consent of justice, Decem. 24th, 1825," with no further details.
More information on contracts of indenture from the city of New York can be found on the New-York Historical Society website, where a larger collection of these contracts is located.
New York (N.Y.). Alms-House and Bridewell Commission. Indentures of Apprenticeship, 1821-1823. Call number: MSS 001624 B SCDIRB Dibner Library
--Diane Shaw, Special Collections Cataloger, Smithsonian Institution Libraries