 What was Sanderson studying?
I guess I was about ten when Wyatt and Carpenter made the last attempt—that was in 2082, I think. He was a major in the Interplanetary Service for some years and hung onto the title after he gave up his commission. He was with Armstrong on Mars during his Service days, did a good deal of the original mapping and surveying for the Colony there. We spent an evening here at the Red Lion, talking about old times; he told me about the Vulcan business, and how he’d been out to see Sanderson and the Twilight Lab on Mercury, and how he preferred a hot trek to a cold one any day of the year—and then he wanted to know what I’d been doing since Venus and what my plans were.
 The Sun
 The Brightside  The Darkside  The twilight zone  The Sun