I had a little spare time today and I revisted the National Archives website. I have searched ARC at the National Archives before, but given the typical occupations of my ancestors, I rarely have too much success. However, today I made a lucky hit.
A younger sibling of my wife's great-great-grandmother (George Drollette) was supposedly the secretary to the US ambassador to China in the early 1900s. A search on ARC on his last name resulted in a hit apparently to his application papers to work in the diplomatic corps. I'm working on requesting a copy of his application and as new information is obtained, we'll be posting updates.