A pair of Robins had made their nest on the horizontal branch of an evergreen tree which stood near a dwelling house, and the four young had hatched when a pair of English Sparrows selected the same branch for their nest. When the Robins refused to vacate their nest, the Sparrows proceeded to build theirs upon the outside of the Robin’s nest. To this the Robins made no objection, so both families lived and thrived together on the same branch, with nests touching. The young of both species developed normally, and in due time left their nests. The branch bearing both nests is now preserved in the college museum.—Oberlin College Bulletin.