On March 1, 1896, I visited Milwaukee, and made a careful inspection of this beautiful flock. I am greatly indebted to Mr. Whittaker, through whose courtesy we saw and heard so much of value and interest, not only in regard to his pet birds, but also about his large experience with the wild pigeon in its native haunts; for, being a keen observer of nature, and having been a prospector for many years among the timber and mining regions of Wisconsin, Michigan and Canada, his opportunities for observation have been extensive. In the fall of 1888 Mr. Whittaker received from a young Indian two pairs of pigeons, one of adults and the other quite young. They were trapped near Lake Shawano, in Shawano County in northeastern Wisconsin. Shortly after being confined, one of the old birds scalped itself by flying against the wire netting, and died; the other one escaped. The young pair were, with much care and watching, successfully raised, and from these the flock has increased to its present number, six males and nine females. The inclosure, which is not large, is built behind and adjoining the house, situated on a high bluff overlooking Milwaukee River. It is built of wire netting and inclosed on the top and two sides with glass. There is but slight protection from the cold, and the pigeons thrive in zero weather as well as in summer. A few branches and poles are used for roosting, and two shelves, about one foot wide and partitioned off, though not inclosed, are where the nests are built and the young are raised. It was several years before Mr. Whittaker successfully raised the young, but, by patient experimenting with various kinds of food, he has been rewarded. The destruction of the nests and egg, at times by the female, more often by others of the flock, and the killing of the young birds, after they leave the nest, by the old males, explains in part the slow increase in the flock. When the pigeons show signs of nesting, small twigs are thrown onto the bottom of the inclosure; and, on the day of our visit, I was so fortunate as to watch the operations of nest building. There were three pairs actively engaged. The females remained on the shelf, and, at a given signal which they only uttered for this purpose, the males would select a twig or straw, and in one instance a feather, and fly up to the nest, drop it and return to the ground while the females placed the building material in position and then called for more.