This Oakland Museum Art Department book
has a short but sweet Cecil Jones writeup:
"...in the Los Angeles area during the chaotic, early depression period...(Cecil Jones) was associated with Fred and George Robertson at Claycraft for two years."
and:
"At the peak of the depression in 1933, he was employed briefly by the Van Briggle Pottery and assisted in organizing the Broadmoor Art Pottery..."
Try to borrow a copy.
amazon.com link
"...in the Los Angeles area during the chaotic, early depression period...(Cecil Jones) was associated with Fred and George Robertson at Claycraft for two years."
and:
"At the peak of the depression in 1933, he was employed briefly by the Van Briggle Pottery and assisted in organizing the Broadmoor Art Pottery..."
Try to borrow a copy.
amazon.com link