Boy in the Box Discovery Site

The Boy in the Box is perhaps America's most famous crime mystery. The poor boy's body was found in 1957 in this spot, approximately. It is hard to give the exact location, as so much has changed since 1957, so please do not bother any residents on this street. To make the estimation, I looked at the Philadelphia Inquirer's map, on p. 1, Feb. 27, 1957, https://www.newspapers.com/image/176082838/; http://americasunknownchild.net/map.htm; http://americasunknownchild.net/map.htm; and coordinates from http://wikimapia.org/13937708/Boy-in-the-Box-Discovery-Site; among others.