Various, Blackwood's Edinburgh Magazine…
“ Your books will prove it, that the portion of granite pavement in the Poultry was taken up six or seven times during a period of three years. When the wood paving becomes a little slippery, go to your granite heaps which belong to this commission, or to your fine sifted cinder heaps, and let that be strewed over the surface; that contains no earthy particles, and will, when it becomes imbedded in the wood, form such a surface that there cannot be any possibility be any slipperiness— (hear, hear!) Do we not pursue this course in frosty weather even with our own stone paving? ”
