OK did a bit of research last night.

1) It's not on "Folk Routes, New Routes", I mis-remembered.

2) It's is on Electric Muse as noted above, and the recording on there is the Thamessiders with Davey Graham recording, from the EP.

3)White Summer is credited on the Yardbirds album as a Page composition. It was recorded by Page and a tabla player in 1967.
The Yardbirds biographer notes that it was "inspired by the work os fusion guitarists Bert Janch and Davey Graham"

love, john