Silbury Hill 180
Image by photobabe

I'll find out.
I was given some graphs by the chap who runs Wiltshire Young Archaeologists for fun but there is no book title on the pages.

It wasn't in the Blue Peter Annual 1536 BC...

but there was a very interesting article on making your own chalk carrying device using sticky backed osiah reed weave !

VBB

It was aimed at the right level then. Don't make a mess with the wax crayons though......