Meanwhile, during the temporary confusion that ensued on deck in consequence of this untoward incident, I employed myself in the careful measurement of the angle made by the mast-heads of the two strange sail with the now sharply defined horizon, and noting the result upon the back of an envelope which I happened to have in my jacket pocket.  I had scarcely done this when the skipper hailed me, asking whether we seemed to be gaining anything upon the strangers, or whether I thought that they were running away from us.  I replied that the breeze had reached them too recently to enable me to judge, but that I hoped to be in a position to let him know definitely in the course of the next half-hour. I then explained to him what I had done, and he was pleased to express his approval.  Meanwhile we continued to steer a course about midway between that of the two strangers, by which means it was hoped that we should be able to keep both in sight, in readiness to haul up for that one upon which we seemed to be most decidedly gaining.