20th century guide 1.jpg20th century guide 2.jpg20th century guide 3.jpg In the 1922 book, "The 20th century guide for Diesel operators", there are a couple of articles involving Ashton Valve products.
The link to the entire book is below too.
Part 1
Some of the old Ashton catalogs are available to view at archive.org
https://archive.org/details/ashtonvalvetradecatalogs
Thank you for your interest. And thank you for forwarding a mention to the S&D Reflector magazine. I have put together a "steamboat" version of the story for those who might be interested. I have quite a bit of information that I've been collecting over the last 3 years and I love sharing it.
The next attachments are from the 1914 catalog and mention the "points of mechanical superiority" of an Ashton valve.