Images from the Getty Library used for the PAN covers. They are dated 1900, 1911, 1930 and 1930.
PAN 0330 246194 from 1976 Cover Artist Michael Leonard	PAN 0330 241990 from 1974 Cover Artist Michael Leonard
PAN 0330 246186 from 1976 Cover Artist Michael Leonard	PAN 0330 242008 from 1974 Cover Artist Michael Leonard
PAN 0330 241990 from 1979 Cover Artist Michael Leonard	PAN 0330 26270X from 1980 Cover Artist Michael Leonard
PAN 0330 242008 from 1979 Cover Artist Michael Leonard	PAN 0330 31520X from 1990 Cover Photo Macmillan Publishers