In the article on “An Investigation of the Control Graph: Influence in a Staff Organization,” by Lawrence K. Williams, L. Richard Hoffman, and Floyd C. Mann, published in the March 1959 (vol. 37, no. 3) issue ofSocial Forces, Figure 3 (p. 192) should have been labeled Figure 4 and Figure 4 (p. 193) should have been labeled Figure 3. We regret this error and hope subscribers will correct their copies.—Editors