Re my post of 12:22 and the problems with the tune version in Hogg for Derwentwater. The first half of the tune didn't make sense (it was in 6/8, key C and didn't seem to fit the words, whereas the 2nd part was in 3/4 key G and did) and I suspected it was an error in the printing. I've just had a look at a different copy and the tune there is the same as in The Minstrelsy, so it probably was just a printing error in the first copy I checked.
So back to the other 2 tunes listed for Derwentwater's Farewell in the DT. Hogg gives the same tune for both Derwentwater and Derwentwater's Goodnight (=Derwentwater's Farewell) and this is the only tune I've heard for Derwentwater's Farewell - the same tune as in The Minstrelsy. The other two, as far as I know, have only been used for Derwentwater, not Derwentwater's Farewell. (I think that's what I mean!).