When did Willem Docters van Leeuwen and Willem Bosman die?

Tue Sep 23 18:45:49 CDT 1997

Willem Docters van Leeuwen was a biological collector collecting in SE
Asia. He was born in 1880 but when did he die?

Willem Bosman was a biological collector visiting Africa. He was born in
1672. When did he die?

Thanks for help.
  Boerge Pettersson
  Swedish Biodiversity Centre (CBM)
  Box 7007            Tel: +46-18 67 27 44 or 20 48 95
  SE-750 07 Uppsala   Fax: +46-18 67 34 80 or 67 35 37
  Sweden              http://www.slu.se/cbm
  Visiting address: Backlosavagen 10A
  E-mail: Borge.Pettersson at cbm.slu.se