By one of these very strange coincidences, I was looking at the cover of the "Fotheringay" LP today, and if the portrait on the front is anything to go by, she was a good head shorter than anyone else in the band, and this is confirmed by the band photo on the inside of the double sleeve.

http://youtu.be/pDMKNv8l2KM

If the above link works, you can see it on "Youtube" where someone seems to have uploaded the whole album.