On Jeffreys and Nelson, I found this little quote in a book called Victorian Song - From Dive To Drawing Room by Maurice Willson Disher, 1955:

"[...of the song Ducking's Row by Lucy Ann Rhensherl, arranged by S. Nelson:...] It was published at 21 Soho Square by Charles Jeffreys, whose output as a man of business did not include the most memorable of his efforts as a poet. He is the author of "Mary of Argyle", for which Nelson composed the tune. Together they tried again, in a song of equal merit called "The Rose of Allandale", but far less successfully."

It goes on to mention a few of the other songs he wrote: "A Fair Breeze Is Blowing", "'Tis Hard To Give The Hand Where The Heart Will Never Be" and "The Song Of The Blind Girl To Her Harp".

Mick