Letter from Karl Pearson, FRS, Biometric Laboratory, University College, London, to James Mackenzie Davidson Thanks Mackenzie Davidson for offering to take radiograms of the 'abnormal' family he has discovered. Explains that the members of the family have 'flappers' instead of hands or feet, with no finger or toe divisions, and that this is a defect that has persisted for generations. Notes that he has written to find out if the mother and one of the daughters would be willing to come up to Mackenzie Davidson's if there expenses were paid. 29 April 1907