Scope and Contents This collection concerns his work with desmids, especially relating to his publications and including drafts and drawings; exchange and identification of specimens; the work and activities of fellow desmidologists; and personal affairs.Correspondents include Pierre Bourrelly (1910–1995), Hannah Croasdale (1905–1999), Franz Eckert, Kurt Förster (1918–1983), Rolf Grönblad (1895–1962), Willi Krieger (1886–1954), John Walter Guerrier Lund (1912–2015), Gunnar Nygaard (1903–2003),...