Click on the map to see a larger (readable!) version.
The oval in the upper right shows the main campus buildings. Walker and Rogers were torn down and in their place was constructed the New England Mutual Life Insurance Company Building. The Natural History Museum in the same block still stands, and has served as the location for a number of retail stores over the years; a Restoration Hardware opened there in April, 2013, with a renovation that revealed aspects of the original building that had been covered for years.
The oval in the center of the illustration is now the site of the John Hancock Building.
See my post on Henry Pritchett, president of MIT in 1905, for more information.
The map is preserved in MIT's Institute Archives and Special Collections; the author added the ovals.