Richard,
The Grainger collection is made up of (poor quality 1908) recordings - not sure if they come with transcripts - ask Malcolm. Hard work, but some beautiful versions.
Carpenter is a massive (14 microfesch) collection of manuscripts accompanied by recorded versions (again poor quality) of usually 2 verses of each song. The most valuable element of the collection is the ballads. Carpenter's original aim was to assemble the largest collection of field recordings of classic ballads - he succeeded.
I know the collection is being worked on at Aberdeen - no idea of progress, but there was a Folk Music journal devoted to the project some time ago.
Jim Carroll