June 29 - 1874 Nantucket were under water, surrounded before rising again; whether they need them or not I could not decide but think they do just. We saw only two S. macromia and I am in hopes of detecting a difference of taste, but will not commit myself yet. The fishermen say that the presence of a flock of terns hovering over the water is an indication of a school of blue fish; the latter driving the small fishes to the surface where the birds seize them. A flock of terns hovering in this way over the water, dozens plunging down at at time within a radius of a few yards, presents a most interesting appearance. They seem to strike their prey on an average of about once in five attempts. Saw a single Chordila perpetua this evening. June 29 Clear & warm with E wind In S.W. we went out to the old wreck when I got a boat to recover the birds that spent the whole morning pulling about, picking up