I've just read R. A. Lafferty's short story "Nine Hundred Grandmothers", published in If magazine and freely available to read online. The story starts with the following line:
Ceran Swicegood was a promising young Special Aspects Man.
The story then goes on to provide some introduction to Ceran and his travelling companions, before delving into the world of the Proavitoi which is the main point of the story. But I never quite understood, what is a "Special Aspects Man"? Are all of Ceran's crew (Manbreaker, George Blood, etc.) Special Aspects, and his only difference with them is that he kept his name and his inquisitive nature? Or is his difference with them that he's Special Aspects and they're something else? Their purpose in general seems to be interplanetary trade, but he seems to occupy a special role (what?) within the crew.