Baade's papers at present consist in 22 boxes and one large folder. The first 14 boxes (1-14) are 5-inch legal sized Hollinger boxes. The next 5 boxes (15-19) are 5-inch letter sized Hollinger boxes. Box 20 is a flat Hollinger box, 202" x 162" x 3", containing oversized charts and photographic prints. Boxes 21-22 are flat Hollinger boxes, 24" x 20" x 3" containing oversized charts and photographic prints. The oversize folder contains large charts which would not fit into the standard boxes. The following list denotes the content of each box giving a very general description of the subject of the material included. The numbers in parentheses following each major heading corresponds to the numbers on Henrietta Swope's list and need not be retained after further cataloguing.

Wilhelm Heinrich Walter Baade (he did not often use his first two names) was one of the most important astronomers of the twentieth century. As an observer at the Mount Wilson Observatory, he ranks alongside Edwin Hubble in significance. Baade, however, was an excellent theoretician as well as observer. His interest in the stellar content of various star systems led him to develop his famous concept of stellar populations. And his observing skill led to his unexpected resolution of the inner parts of the Andromeda galaxy into individual stars. His work with the new 200-inch Hale telescope would eventually lead to a change in contemporary knowledge of the distances of the galaxies. Though his scientific method resulted in much of his work being published posthumously, Baade's impact on the development of astronomy was enormous.

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