Reply to "Why no PRR 4-8-4 Locomotives?"

There were two articles in the PRRT&HS society's magazine, The Keystone, that gave some idea what PRR 4-8-4s may have looked like.  In Vol.31, No.1 there is a short article with specifications, and a painting of a modern PRR 4-8-4.  In Vol.33, No.3, there is another article on two PRR 4-8-4s, an early one based on the M1,  and another from the 1940s, with detailed elevations.  Still available as back issues AFAIK