The main body of correspondence, donated by Lillian Hodgehead to the University in 1962 spans the years 1919-1958. It consists of letters written by Bloch to Lillian Hodgehead (initials LH) and Ada Clement (initials AC) or both of them (joint). Lillian Hodgehead and Ada Clement were Bay Area musicians/teachers/ administrators long connected with the San Francisco Conservatory and were instrumental in bringing Bloch to the Bay Area as a teacher/administrator at the Conservatory in the 1930s. There are 595 letters in this series.

All requests for permission to publish or quote from manuscripts must be submitted in writing to the Head of the Music Library.

Collection is open for research, with the following exception: