Hi Azizi
Not sure if I can put my email address on here, used I think not to be possible as a protection measure. If you Google my name you'll find my email address various places, if you select the Scottish Storytelling Centre website it is certainly on there.
Email me and I'll send you the section of the book that discusses Jingo Ring. The rhyme you quote above may offer a clue re source meaning?
Like you I want to augment what the Opies have done by concentrating on a particular area, in my case Scots kids songs and rhymes of last 150 years, giving varying versions that show origins / change / decay / development over time. I'm also much interested in tunes, which the Opies made little of.
I should have said that my book gets published on 1st October, don't have ISBN number to hand. Amazon etc already have it on offer at the wrong price [was to be £9.99, now upped to £14.99, published by Birlinn, title Doh Ray Me When Ah Wiz Wee.
I think that the only Opies book that treats a great deal with sources is The Singing Game, which has a few what they term 'clapping' rhymes, but their other books provide mnay clues.
Look forward to discussing wwith you direct.
Ewan