He defended his doctorate at the age of twenty-two.
The exam was chaired by the German physicist and Nobel laureate James Franck, who is reported to have said at the end: "I'm glad that's over. He was at the point of questioning me".
Anna’s ashes are stored in a columbarium at Golders Green Crematorium.
Her urn was decorated with a ballet shoe, which was stolen. Currently, the decoration involves a dancing ballerina and a swan.Dandré’s urn is placed below his wife’s.