Sentence:  From this port the ten destined for Monterey sailed on the <WSD>packet-boat</WSD> "San Antonio," on the 2d of January of the year 1771, and after fifty-two days of rather trying voyage, on account of many bad storms, they arrived without incident at the port of San Diego on the 12th of March. 
Meaning of the word marked with <WSD> tags:  Government-commissioned mail ship.