'I am trying to find out the location of the music materials that belonged to the late pianist William Duncan Allen'

The African American pianist William Duncan Allen was born in Portland, Oregon December 15, 1906; and died in Richmond, California August 19, 1999. Prof. Dominique-René de Lerma, whose email address is dsl@afgconsulting.org, makes this research request:

“I am trying to find out the location of the music materials that belonged to the late pianist William Duncan Allen, student of Egon Pei, teacher of Sylvia Olden Lee, and frequent pianist for most of the significant singers since Paul Robeson.”