The forth network digitized is Ron Rewald and Bishop, Baldwin et. al of Honolulu, c. 1978-83. The GraphML data is on the networks page. The effort to digitize it was comparable to the previous tests. Since I gladly own that specific piece, I could simply take a photo and the apply the usual approach of visually extracting all relations and putting them into the initial Excel file. See here  for the picture I used: