Sentence:  For every trunk, portmanteau, chest, box, bag, bundle, packet, or parcel, conveyed from any inn to the Custom-house, and from thence to or on board any boat, passage vessel, or <WSD>packet boat</WSD>, or landed from any boat, passage vessel or <WSD>packet boat</WSD>, and conveyed to the Custom-house, and from thence to any inn, or to the Custom-house only, or direct to any inn, or to any part of the town, not exceeding 28lbs in weight, whether carried by barrow, knot, or hand 
Meaning of the word marked with <WSD> tags:  An ocean-going ship chartered by the government to carry the mail and official communications.