On the eighteenth day of the month of June, in the sixth year of my sojourn on the island, I descried a sail. But it passed far to leeward at too great a distance to discover me. Rather than suffering disappointment, the very appearance of this sail afforded me the liveliest satisfaction. It convinced me of a fact that I had before in a degree doubted, to wit: that these seas were sometimes visited by navigators.
Among other things, where the seals hauled up out of the sea, I built wide-spreading wings of low rock walls that narrowed to a cul de sac, where I might conveniently kill such seals as entered without exciting their fellows outside and without permitting any wounded or frightening seal to escape and spread a contagion of alarm. Seven months to this structure alone were devoted.
