Trumpeter Lake 254. 0177P507 Yellowstone June 17, 1932. yesterday evening Griswold went to Trumpeter Lake, after an absence of 2 1/2 days. The swans were gone from the lake, and the egg destroyed. One egg was found in the nest broken. one also found on the rim of the nest also broken. a third was found under water about 25 feet from the nest also broken. the fourth was not found. There was no fle. Today, Griswold & I returned to Trumpet Lake. No tracks, sign, nor feathers of any possible enemy were found. The fourth egg was finally found on the island about 200 ft from the nest. it was broken in (with hole on one side) with a few pieces of shell in the grass beside it. Shell was clean inside. One of the eegs Griswold brought in last night had[illegible] contained a partially formed embryo, another had blood vessels around the [illegible] of the membrane. The eggs could not have been more than half incubated, judging from this scattered distribution of the broken eggs, I am inclined to believe that a raven or crow or some bird broke up the nest. It seems to me that an otter or mink would have sucked the egg in the nest & have broken them more than they were. It looks as though, perhaps, several ravens