Bob, Yeah I see that doesn't work now for me either. To go to the main search page of the British Library this might work. Anyone can seach online through this - cause I don't have a password login! I searched for Only a Leaf as the title, matching all the words, and then clicked on the author to bring up all their records. I notice now that the BL sheet music is published by Francis, Day and Hunter, who were definitely connected with Allan and Co., the publisher of "Grandad's Songs". There's quite a few identical song collections they each published separately, like "Hillbilly Album" No.s 1-3.

My copy of "grandad's songs" is definitely 30s vintage. But the local library has a 1970s reprint, so it's remained popular.

I wonder if his 'Ride-a-Cock Horse' is an arrangement of the nursery rhyme...