A marked exception to the above rule is furnished by the eggs of the Baltimore oriole, perhaps the most fantastically marked of all our birds' eggs. One would hardly expect a plainly marked egg in such a high-swung, elaborately woven, deeply pouched, aristocratic nest. The threads and strings and horsehairs with which the structure is sewed and bound and stayed are copied in the curious lines and markings of the treasures it holds. After the oriole is through with its nest, it is sometimes taken possession of by the house wren in which to rear its second brood. The long, graceful cavity, with its fine carpet of hair, is filled with coarse twigs, as if one were to build a log hut in a palace, and the rusty-colored eggs of the little busybody deposited there. The wren would perhaps stick to its bundle of small fagots in the box or pump tree, and rear its second brood in the cradle of the first, were it not that by seeking new lodgings time can be saved. The male bird builds and furnishes the second nest, and the mother bird has begun to lay in it before the first is empty. The chatter of a second brood of nearly fledged wrens is heard now (August 20) in an oriole's nest suspended from the branch of an apple-tree near where I write. Earlier in the season the parent birds made long and determined attempts to establish themselves in a cavity that had been occupied by a pair of bluebirds. The original proprietor of the place was the downy woodpecker. He had excavated it the autumn before, and had passed the winter there, often to my certain knowledge lying abed till nine o'clock in the morning. In the spring he went elsewhere, probably with a female, to begin the season in new quarters. The bluebirds early took possession, and in June their first brood had flown. The wrens had been hanging around, evidently with an eye on the place (such little comedies may be witnessed anywhere), and now very naturally thought it was their turn. A day or two after the young bluebirds had flown, I noticed some fine, dry grass clinging to the entrance to the cavity; a circumstance which I understood a few moments later, when the wren rushed by me into the cover of a small Norway spruce, hotly pursued by the male bluebird. It was a brown streak and a blue streak pretty close together. The wrens had gone to housecleaning, and the bluebird had returned to find his bed and bedding being pitched out-of-doors, and had thereupon given the wrens to understand in the most emphatic manner that he had no intention of vacating the premises so early in the season. Day after day, for more than two weeks, the male bluebird had to clear his premises of these intruders. It occupied much of his time and not a little of mine, as I sat with a book in a summer-house near by, laughing at his pretty fury and spiteful onset. On two occasions the wren rushed under the chair in which I sat, and a streak of blue lightning almost flashed in my very face.