Christiaan Lodewijk Houthuysen
1930 · Good · NL
€30
Charles Darwin
1931 · Good
€55
Neltje Blanchan
1906 · Very good
€70
Peter Kropotkin
1931 · Very good
€60
Frederick Orpen Bower
1934 · Good
€50
Hendrik Blink
1925 · Fair · NL
€20
Howell, Thomas
1909 · Very good
€30
Patrick Geddes
1903 · Good
€70
J. Reynolds Green
1916 · Fair
€20
Charles Darwin
1910 · Good
€85
J. Haak
1928 · Very good · NL
€30
Carlton C. Curtis
1907 · Fine
€50
Adolf Engler
1917 · Good
€25
Snyder, Harry
1925 · Good
€20
Phillips Brooks
1900 · Fair
€40
Eduard Strasburger
1935 · Fine
€45
Frederick Orpen Bower
1935 · Good
€35
John Merle Coulter
1912 · Good
€55
Frederick Orpen Bower, Sydney Howard Vines
1903 · Fair
€45
Campbell, Douglas Houghton
1911 · Fair
€25
Stijn Streuvels
1912 · Fair · NL
€15
Stijn Streuvels
1912 · Good · NL
€65
Julie Hoek
1930 · Very good · NL
€35
Charles Kirk
1918 · Fair
€65
Charles W. Nash
1902 · Good
€25
Mabel Osgood Wright
1903 · Good
€40
Ralph Rodney Root
1935 · Fair
€25
André Gide
1931 · Very good
€25
Nathaniel Britton
1904 · Fair
€60
Anton Kerner von Marilaun
1914 · Good
€65
John Merle Coulter
1915 · Very good
€40
T. Takakura, Tadashi Takakura
1901 · Fair
€40
Roy Chapman Andrews, Yvette Borup Andrews
1921 · Good
€105
Phillips Brooks
1911 · Very good
€25
Peter Kropotkin
1903 · Fair
€15
Grant Allen
1935 · Good
€75
John Burroughs
1905 · Fair
€55
Neltje Blanchan
1935 · Fair
€65
Heindel, Max, Max Heindel
1918 · Very good
€30
Abraham Kuyper
1911 · Fine · NL
€30
Frederick Orpen Bower
1919 · Good
€30
Wouter Hendrik Van Seters
1935 · Good · NL
€50
Sachs, Julius
1902 · Fine
€80
Willem Kloos
1902 · Very good · NL
€65
Arthur Radclyffe Dugmore
1914 · Very good
€50
Christopher Morley
1935 · Good
€30
Heber W. Youngken
1935 · Fine
€110
Verney Lovett Cameron, Daniel Oliver
1912 · Good
€25
Archibald Rogers
1926 · Good
€25
Marcellus Emants
1900 · Very good · NL
€25
Marcellus Emants
1904 · Good · NL
€20
Arthur van Schendel
1921 · Fine · NL
€35
Eduard Strasburger
1924 · Fine
€40
Charles Darwin
1909 · Fine
€90
Jacob Gijsbert Boerlage
1925 · Good · NL
€55
George Scott Robertson, Arthur David McCormick
1900 · Very good
€30
Edward Carpenter
1906 · Good
€25
Pieter Joseph Cruse
1911 · Fine · NL
€30
M. Buys
1935 · Good · NL
€25
Frank Hall Thorp
1906 · Good
€25