LIBRARY TRENDS, Vol. 62, No. 3, 2014 (“Essays in Honor of W. Boyd Rayward: Part 2,” edited by Alistair Black and Charles van den Heuvel), pp. 596–612. © 2014 The Board of Trustees, University of Illinois Abstract Contemporary literature on the divergence of libraries, archives, and museums over the course of the twentieth century credits the rise of distinct professional practices required to h...