Colin Cohen notes the following references

Walker, R., The De Pass Family, unpublished dissertation, Bristol Polytechnic, 1979 The De Pass family / by Rebecca Walker [Bristol : unpublished , 1979]. 169 leaves ; 30cm. Xerographic reproduction. Thesis (B.A. - Hons in Fashion) - Faculty of Art and Design, Bristol Polytechnic, 1979. UCL (University College London); 
1362
Price, B.D., Biographical Notes on Alfred Aaron De Pass (1861-1952) Art Benefactor Extraordinary, Falmouth, 1982; [Biographical notes on Alfred Aaron de Pass (1861-1952): art benefactor extraordinary / edited by B.D. Price from private documents in the possession of Mrs. Hugh Walker [nee Phoebe Prince, granddaughter of Alfred de Pass ... ] and from the registers and diaries of Henry Scott Tuke. Tate Library (Tate Britain)]