Explanation: This CASK website is not a blog or a chat group, it more closely resembles a Wikipedia topic. Therefore it is not a venue for expressing opinions but rather aims to provide a knowledge base for collectors of antique Sheffield knives. This will be achieved as the website is progressively updated, elaborated, and/or corrected as additional information becomes available – via contribution from fellow collectors and experts, hopefully. Please keep this in mind if you are considering contacting the author or joint authors via the website.