Forestry Commission:
Papers /correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease”, - “Papers 1893 – 1953”
Letter from I.B.Balfour, dated 19 Nov. 1903, to N. Smith; Past Master of the Worshipful Company of Carpenters, regarding 'Forestry'.
Imperial Foretry Institute, Oxford -Papers /correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease" “Papers 1893 – 1953”

•Papers correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease” – “Papers 1893 – 1953”.

Papers correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease” – “Papers 1893 – 1953”.

•Papers/ correspondence re: Dutch Elm Disease filed in Box “Dutch Elm Disease” - “Papers 1893 – 1953”