I agree with kat on this one. In instances where it is impossible to find 'proof' I don't see any harm in using a modicum of common sense and taking an intelligent guess at some things.

In pre Christian times people in Britain and France worshipped stones. Their leaders (or priests or scientists or whatever you want to call them) aligned stones as primitive observatories. It is reasonable to assume that those leaders also told people it is forbidden to move them(They are sacred).

Corn dollies, Now can we find a logical reason for them to have been sacred. Yup, Choose the biggest ears of wheat from the crop and make ornaments out of them, hang these ornaments in your home and don't eat the wheat (They are sacred). Then, come the beginning of the next season there is a supply of chosen seed for planting. Makes sense.
Don't forget that their leaders were 'The Wise Ones'.

The Early Christian Church used to incorporate the 'pagan stones' into the actual buildings of their churches (Stratford Church in East London, England has one), or they would build the churches near the stones (Beauchamp Roding in Essex, England has one in the churchyard)

It is also reasonable to assume that, seeing as the Church borrowed so much from the indigenous religions, they may also have borrowed some of the music (especially since music is such a powerful and prominent part of the worship in many religions). Some early hymns may perhaps contain vestiges of pagan origins, even though it is probably impossible to find any 'proven' instances.

Bert.