I have just posted extracts from The War Journal of Bernard Joseph Brookes which I recorded in 1994 when I was drafting The London Gunners come to Town. It covers the period from August 1914 to the beginning of November, 1914.
My original notes are shown unchanged (apart form some minor formatting differences) but I have added some brief biographical details and a portrait photograph of Bernard taken later in the War.
One interesting a feature is that in 1994 I added a footnote about Military Firing Ranges which reads:
The firing range used was probably in the grounds of Mr Secretan's house, The Dell, at Bennett's End, presumably a disused brick pit. The main military ranges were at Gorhambury, and at Chalk Hill, Westfield Farm, St Stephens. However work on constructing these ranges only started towards the end of September and the earliest record I have found of them being used in November, after the Queen's Westminster's had left Leverstock Green.
So I had the answer to the question "Where is the Chalk Hill firing range?" all along - but in an obsolete format - which my searches were not recognizing it!