It was well that I took this precaution, for when daylight came we found that, so admirably had nature masked the cove, it was impossible for us to discover it until we again stood close in; and even then we could by no means make sure of the spot until we were within a cable's length of it.  Then, however, by means of a carefully taken set of compass bearings, I obtained the means which would enable me to run in from a distance and hit off the place with unerring precision.