)By 1911, Wall was operating gypsum (Calcium sulphate), dolomite (Calcium-Magnesium carbonate) and limestone (Calcium carbonate) quarries on Dolomite Road at Mount Knowles near Mudgee (possibly with his brothers Ignatius and Damian) and ran a private tramway to move the quarried stone to connect with the main railway from Mudgee to the Blue Mountains at Wall's Siding, Mount Knowles.Others were also quarrying in that area.