Google Earth has stopped working for me...must have done something wrong...but it seems to me that the Farmers lift locks would be about 500yds north of the Old Royal and Livery St. would run by them. The various lock levels had short wharves I think. The canal would be the Fazely Canal, or too such. Not far away from the Livery address, at the bottom of the locks and on the other side of Snow Hill would be a longer run of Wharves. All still there. Coal wharves and such.
I suppose the dates co-incide...and what a remarkable find indeed. So, from the Old Royal Hotel, opposite the Great Western Arcade on Temple Row (gone now of course)...walk across to Colmore Row on the east walkway of St. Phillips (past the Blue Coat School)...down Livery St. to the above address. You would be walking in Dickens footsteps. A remarkable find indeed...well done.
Should be a walking route for all keen visitors interested in what matters. You guys could offer 'tourist guide tours' on little golf cart trains. There is so much still to see and if not see, to think about.