The general directory lists Dr. David A. Ventworth under Biological Observation. That entry describes his public appointment. It is not a reliable guide to the work billed against the west rooms.
Staff could retain a public appointment while undertaking contracted work for a separate department. The arrangement reduced the number of forms while increasing, very considerably, the number of misunderstandings. In this instance both have been retained.
Consult the transfer minute and match the project number. The file ECHO-021 concerns the apparatus; ECHO-047 concerns its later custody. They are not two experiments.
Notebook question: Which department employed Ventworth on the west-room project?
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Retained correspondence · People trail · Accession copy, not a new event