When did Willem Docters van Leeuwen and Willem Bosman die?

[Boerge Pettersson]

Hello everybody,
A colleague of mine is writing a book and has asked me to help him to
answer certain questions about biological authors and collectors. Now I
wonder if anybody of you could help me with the following questions:

Paul Dudley, N America, early 18th century. Wrote 1724 about wind
pollination and seed contamination in maize (corn).
When was he born?
When did he die?

Charles Robertson, Illinois, active 1880-1920.
When was he born?
When did he die?
Does anybody know of a photo (or other portrait illustration)?

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

Dora Ilse, worked with sensory physiology, esp. on butterflies.
She was born in 1898.
When did she die?

Hans Kugler, active 1930-1970?
When was he born?
When did he die?

=46ritz Schremmer, active 1930-?
When was he born?
When did he die?

Karl Daumer, working with bee vision, active in the 1950ies.
When was he born?
When did he die?

Thanks for any 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
  E-mail: Borge.Pettersson at cbm.slu.se