http://www.freerepublic.com/focus/f-bloggers/2306741/posts
makes a case the document may be from from BO sr/anna dunham divorce files, explaining the 1964 issue date
There was at least one real person named E.F. Lavender:
http://ndpbeta.nla.gov.au/ndp/del/printArticleJpg/1536351/3?print=n