Wemer and Willett reported in <i>Archaeometry 17 (2) p. 143 that Wunmonije head no. 4 from Ife had a brass composition unique among Ife castings, though Barker had earlier shown it to be of copper. It now appears that Barker's sample-hole was filled in with a brass rod which Willett had unknowingly sampled as the original hole was undetectable. It is recommended that in future sample-holes be filled with an inert substance quite different from the matrix and that wherever possible total disguising of the hole be avoided.