 Semba cites an extraordinary 1918 letter written by Edwin B. Hart, chair of the University of Wisconsin department of agricultural chemistry, to the journal "Science".Hart states in this letter, which was published under the title "Professional Courtesy", that a paper co-authored by McCollum and Nina Simmonds, "A Study of the Dietary Essential, Water-SolubleB, in Relation to its Solubility and Stability Towards Reagents", is actually the work of Harry Steenbock, who is mentioned only in a footnote and is thus the victim of a "gross injustice".Further, Hart says that all the records of rat feeding at Wisconsin disappeared during the change of staff.