Mystery Patent Bottle

Mystery patent bottle, embossed Lawrence & Hawkins Patent, with a metal external screw-on cap with the remains of a brush in the top. Inside the bottle is what appears to be a large rubber washer, which is too large to have gone through the neck unless it was bendable. The glass is stained a reddish-brown from the remnants of the contents, which must have been released slowly into the brush when the bottle was held upside-down. It may have been some sort of varnish or lacquer. Found amid ash and domestic refuse of the 1890s.