From an old society of antiquaries report from 1896 called 'Ancient British Barrows'. I do a lot of 'digging' around 2nd hand book shops and sometimes it pays off.
PS I do have some text to post up too, but it's a report covering loadsa sites and comparing them (i.e. number of skeletons in each), so tis a lot of fun unpicking it. The language can be a little confusing as well (they call round barrows 'long barrows' when there not and it's all a bit 'cromlech' for my liking. Soooooo 19th Century LOL :-)
Are there any sites your particularly interested in? (it seems to focus only on Wiltshire)
WF