"Bonnie" Kate Harvey was an English music hall serio-comic singer active during 1880s/1890s.
According to a critique given in The Era, London, Sunday, 23 November 1879, p. 4a) she sang the following songs.

• Down in the lane by the old toll gate
• An old man's darling
• It might have been naughty, but you have all done the same
• A Bonnie Boy in Blue

This list is derived from information provided by Monologues.co.uk which went down sometime in 2023.
The loss of this valuable resource is very sad and a mystery.