This series consists of incoming and outgoing correspondence & accounts from 1913 to 1942 with gaps. Two binders of correspondence with fellow entomologist Dr. Justis Watson Fulsom of Louisianna from 1922 - 1936 are also included in this series. Some files of correspondence dated before 1913 were discarded prior to deposit of the collection in the Arnprior & McNab/Braeside Archives. The arrangement of this series reflects the original order.
January 1913 - Dec 1914
January 1915 - June 1919
July 1919 - Feb 1924
July 1924 - June 1928
July 1928 - December 1933
December 1933 - October 1938
December 1938 - December 1942
January 1943 - December 1944
Correspondence with Dr. Justis Watson Fulsom, an entomologist from Louisianna 1922 - 1936
Added to this series in 2015 is an accession consisting of correspondence with Dr. Bruno Prochaska who used the psudonym of Bruno Wolfgang. A leather bound volume contains clippings of published articles written by Dr. Prochaska in German. Macnamara translated one undated letter about the political situation in Austria in about 1936.
Added to this series in July 2016 are numerous letters, cards and photographs from Prochaska's family to Mrs. Jean Cunningham and her children Judith, Alison and Jamie from 1946 to 1955. They are written in English. Apparently, the Cunningham family sent food, books, clothing and toys to the grandchildren of Dr. Prochaska and he in turn sent stamps, cards and letters of thanks.