Lucky me, I was subjected to a 24-hours layover in New York City when returning to Seattle from Paris last month, and was able to visit the Society of Illustrators' digs on East 63rd Street where they are holding an exhibit of Manchess' works through 26 October.
The paintings were scattered around the walls of the upstairs dining room. Lighting conditions varied, but I tried my best to photograph details in such a way that his brushwork was revealed. Below are some of my photos. I decided not to include images of complete works, because that doesn't concern me in the present case. The small images below approximate a distant view; click to enlarge to observe the brushwork in more detail.
As you probably noticed, Manchess likes to work with square-tipped brushes, though he uses other brushes when needed, especially for details. His level of experience has reached the point where his brush strokes are both economical and decisive. I envy that.