Hello, I am looking for a reference source, possibly with silhouettes, on the vintage merchant ships with plumb bow, which were built at the end of the 19th century till the 1920s. Many of these were built by various shipbuilders worldwide, and were also lost during WW I and WW II. The design of merchant ships with plumb bow seems to have been eventually retired in the 1930s towards the more contemporary racked or flared bow concept. Do you know if such a publication is available, possibly in public domain?