This primary source comes from the Records of the Bureau of Public Roads.
Full Citation: Confederate Monument in Alexandria, After Widening of Street; 1932; States - Virginia; Historical Photograph Files, 1896 - 1963; Records of the Bureau of Public Roads, Record Group 30; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/confederate-monument-in-alexandria-after-widening-of-street, May 11, 2024]