More information on the song was posted in this thread: 'Twas on a Monday Morning, O (misplaced there due to my error), including my transcription of a broadside "The Green Willow", the song from which "April Morning" was clearly derived.

I would still appreciate transcriptions or scans of the tunes as originally collected by Wyatt-Edgell and Sharp. Malcolm Douglas said the former is fairly close to the revivalist renditions; it was Tawney's source [Journal of the Folk-Song Society (Great Britain), vol. IV part 2 (issue no. 15), 1910, pp. 94-96]. Malcolm had intended to post the tune, but this was very shortly before his death.

As for dots, they can be derived by inserting either of the ABC transcriptions previously furnished into an online ABC converter with a visual or PDF option, such as the one at folkinfo.org.