My second horn pipe, Joshua's horn is made of plateaux briar. The beautiful straight grain runs down from the natural curve of the briar to a peterson stem. It is stained with black with much of the stain sanded off. The peterson stem lets the smoke out of the top side of the bit which makes it feel cooler since it doesn't hit the tongue directly.
Joshua, I am sure, had one of these in his tent during the siege of Jericho just wishing that tobacco had already been brought over from the New World so he could smoke the inhabitants of Jericho out of their city instead of blowing their walls down.