It is presumed that the stone from which a piece has been accidentally broken is one of the Yorkshire " grit" stones, similar to that obtained from the Howley Park or Idle quarries For mending this kind of stone, mix resin and beeswax in about equal parts over a fire, or preferably over a hot plate, till both are thoroughly incorporated. Pour the mixture into water, and, after it has been well manipulated and allowed to cool, make it up into sticks. To unite the broken pieces, warm the stone, by means hot hot irons, sufficiently to just melt the cement. Apply the cement to the fracture, then press tightly and firmly till set. This cement, however, has no lasting properties when exposed to the weather, but will answer for internal work. If the piece broken off is not too large, use Portland cement mixed with some of the pounded dust of the stone, and a little mineral oxide to give it the necessary colouring. This will make a far more satisfactory and lasting job.