Jefferys, Thomas, -1771
E 4°26ʹ--E 30°25ʹ/N 65°56ʹ--N 53°26ʹ
Atlantic Ocean--Baltic Sea
Likely detached from: Gentleman's magazine, and historical chronicle. Volume XVIII : for the year M.DCC.XLVIII. London : Printed by Edw. Cave, 1748. Map was originally published in the October 1748 issue.
Prime meridian: London.