Ludolph van Keulen
Ludolphus van Ceulin was first, by profession, a fencing-master ; but becoming deafe, he betooke himselfe to the studie of the mathematiques wherin he became famous.
Ludolph van Keulen
Ludolphus van Ceulin was first, by profession, a fencing-master ; but becoming deafe, he betooke himselfe to the studie of the mathematiques wherin he became famous.