British deserters kept crossing the lines

From 1776 by David McCulough. Page 39.

British deserters kept crossing the lines, usually at night and alone, but sometimes three or four together. Half-starved and disgruntled, they came from both Boston and from the British ships in harbor, and nearly always with bits of news or descriptions of their travails, word of which would spread rapidly through the camps the next day. One night a lone British lighthorseman swam his horse across. Another night, fifteen men deserted the ships in the harbor.