42. Helmut Ruhemann, Marjorie Gertler (née Hodgkinson, later Kostenz), Philip Hendy and Mark Gertler, by Lady Ottoline Morrell. 1933. Photograph (National Portrait Gallery, London)
Attributed works:
43. Portrait of a man, by Antonello da Messina. c.1475-76. Photograph made during Ruhemann's 1939 treatment (National Gallery, London)
Attributed works:
44. Portrait of a man, by Antonello da Messina. c.1475-76. Ruhemann's extant restoration (National Gallery, London)
Western art unattributed:
40. Helmut Ruhemann. Before 1934. Photograph (Ruhemann Papers, Hamilton Kerr Institute, University of Cambridge)
Western art unattributed:
41. Early use of a heated spatula in the conservation studios of the Kaiser-Friedrich Museum, Berlin. Photograph (Ruhemann Papers, Hamilton Kerr Institute, University of Cambridge)
Western art unattributed:
45. Helmut Ruhemann teaching in Guatemala in 1956. Photograph (Ruhemann Papers, Hamilton Kerr Institute, University of Cambridge)