Collection J. N. Svoronos correspondence to Hans Riggauer, September 6, 1889 1 letter (1 folder) Svorōnos, Iōannēs N., 1863-1922 Letter from J. N. Svoronos concerning Greek coins. Repository American Numismatic Society
Collection Harold Mattingly correspondence to Hans Riggauer, 1943 - 1949 7 letters (1 folder) Mattingly, Harold, 1884-1964 A packet of seven letters from Harold Mattingly at the British Museum to Professor West at Princeton and Professor Johnson. Repository American Numismatic Society