23. And be it further enacted by the authority aforesaid, That on the return of such ship to the port to which the master and mate declared on oath their intention to return, the proper officers of the customs at such port shall immediately repair on board, and view the condition of such ship and her lading, and certify the same, together with their observations thereon, as also of the real tonnage of the said ship; and the said officers are also to take an account or schedule of the names of the master, mate, and other persons on board, distinguishing therein the harpooners and persons more immediately employed in the said fishery, and to certify the same; and the master and mate shall make oath before the collector and comptroller, (who are hereby impowered and required to administer the same), on the back of, or annexed to the licence granted as aforesaid, which they are hereby then required to deliver up, that they did in pursuance thereof, mentioning the day of their departure, proceed on a voyage directly to the places aforesaid, and have not since been on any other voyage, or pursued any other design or view of profit; and that they did there (mentioning the time of their stay in those seas) use the utmost endeavour of themselves and their ship’s company to take whales, and other creatures living in those seas; and that all the whale fins, oil, and blubber, imported (if any) in such ship, was really and _bona fide_ caught and taken in the said seas by the crew of such ship only, or with the assistance of the crew of some other ship duly licensed for that voyage, pursuant to the directions of this act; all which schedule, certificate, licence, and oath, shall be transmitted by the collector and comptroller of such port to the respective commissioners of the customs for that part of _Great Britain_ where such ships shall arrive; and such commissioners being fully satisfied of the faithful dealings of the master and other persons employed in such ships with respect to such voyage and fishery, shall, on demand, cause payment to be made to the master or owners, or to his or their assigns, by the receiver general of the customs for that part of _Great Britain_ where such ship shall arrive, the bounty or premium following, according to the admeasurement of such ship duly certified as aforesaid; (that is to say), for every such ship as shall proceed on the said fishery, from the twenty-fifth day of _December_ one thousand seven hundred and seventy-five, to the twenty-fifth day of _December_ one thousand seven hundred and seventy-six, the sum of forty shillings _per_ ton; and for every such ship as shall proceed on the said fishery from the twenty-fifth day of _December_ one thousand seven hundred and seventy-six, to the twenty-fifth day of _December_ one thousand seven hundred and eighty-one, the sum of thirty shillings _per_ ton; and for every such ship as shall proceed on the said fishery from the