Before canals and way back Priory Brook ran down from Edgebaston and seemingly a wier may have been made at Summer Row (not lane). This wier would have been 500 yards as the crow flies north west of the Philippes Pole on what was to be Colmore Row. The elevations given on the 1890 survey indicate that this could have been used and a leat dug from there.
So water supply was in the offing and if the Grindstone picture and information is correct , the above water supply would probably have been used and the fishpond was indeed a possibility. Don't think in terms of large volumes of water though. The supply would probably have been modest and hence no major milling operation data available to see.
The following links for ref :https://www.british-history.ac.uk/m...id=10098&ox=790&oy=1125&zm=1&czm=1&x=22&y=227
https://www.bgfl.org/bgfl/custom/re...teacher/history/jm_jones/jmj_maps_1/page9.htm
So water supply was in the offing and if the Grindstone picture and information is correct , the above water supply would probably have been used and the fishpond was indeed a possibility. Don't think in terms of large volumes of water though. The supply would probably have been modest and hence no major milling operation data available to see.
The following links for ref :https://www.british-history.ac.uk/m...id=10098&ox=790&oy=1125&zm=1&czm=1&x=22&y=227
https://www.bgfl.org/bgfl/custom/re...teacher/history/jm_jones/jmj_maps_1/page9.htm