On point that I forgot to mention is in response to both Wayne and Cliff. You need to look at the designs through the eyes of the day they were created rather than today's. Let's take Shawnee as an example.
Shawnee received universal praise and with the beginning of the Shawnee Open which began in 1912 drawing the leading professionals and amateurs from around the country to play in it, Tilly's name as an architect who could design terrific golf courses was spread from coast-to-coast literally overnight. As a result, within 4 years he was working in Florida, Texas and was even out in California. All before he even began advertising his services to any extent.
For their time, both Shawnee and Aronomink were greatly praised by many players of note. Today, if Aronomink was around, it would probably have been changed by now, or if it remained the same, would obviously be hopelessly outdated. Shawnee has undergone many changes and there is very little of the original Tilly left. To judge it based upon today's eyes then would be short-sighted.
It would be short-sighted to do so for any architect. For example, Pinehurst #2 has been changed throughout the years from when it was first designed, including a great deal by Ross himself. Today we would view the original course as mediocre at best, yet we view it through the eyes of what it has become which is special indeed. Still, the original design was also special for its day and so it enabled a backwoods area of the sandhills of North Carolina to become one of the great family vacation and golf destinations in America...