Broom had died in 1951 but Dart was still living. He is said to have wept for joy on Louis' behalf on being personally shown Zinj, which Louis and Mary carried around in a tin (later a box). Louis had considered Broom's "Paranthropus" genus, but rejected it because he believed Zinj was in the "Homo" ancestral stock but Paranthropus was not. He relied heavily on the larger size of Zinj's canines.