The "Ethiopian Serenaders" shared the same name with other troupes.
Ethiopian Serenaders ("The Only Correct and Authorized Edition")
Sheet music cover shows five men, 1 with clackers, 2 with banjos,1 with squeezebox and 1 with tambourine. Printings with this picture:
1845 Philadelphia Gals
1847 My Old Aunt Sally (17 titles listed on cover, can't read)
1847 Old Dan Tucker
1847 Chloe Is My Wife
1848 Buffalo Gals
1848 Lucy Neal
1848 De Boatmen's Dance
1848 Uncle Gabriel
1848 Negro Fishermen
1848 The Old Gum Tree
1848 De Color'd Fancy Ball
1848 My Skiff Is By the Shore
1847 I Wish I Was in Ole Varginny

Nightingale Ethiopian Serenaders
1848, The Yaller Gal with the Josey On

Campbells Ethiopian Serenaders
1848, I See Her At the Window.

Dumbolton's Ethiopian Serenaders
1849, The Female Slave's Lament

Billy Weeks, which of these troupes appeared in London? Or was it another one?