The Can-Toi are first mentioned by Collie Entragien in relation to Tak.
The short story "Low Men in Yellow Coats" in the collection Hearts in Atlantis involves Ted Brautigan running from Can-Toi attempting to recapture him.
The Buick transports objects to todash darkness. It is implied to be the car of a low man.
Callahan describes the can-toi (or as he calls them, low men, to Roland and the others).
“The low men,” Callahan said. “They call themselves that, sometimes, although there are women among them. Sometimes they call themselves regulators. A lot of them wear long yellow coats . . . but not all. A lot of them have blue coffins tattooed on their hands . . . but not all.”
“Big Coffin Hunters, Roland,” Eddie murmured.
Roland nodded but never took his eyes from Callahan. “Let the man talk, Eddie.”
“What they are—what they really are—is soldiers of the Crimson King,” Callahan said. And he crossed himself.
- Part 2 / Chapter 3 / Section 11
The Wolves, she supposed. The real Wolves. The ones in New York. The vampires of whom Callahan had spoken, and the low men. Or was there something else? Something even worse?
- 4th Stanza / Chapter 1
Callahan was holding Jake’s gun . . . and another thing, as well: some sort of carving. Roland was almost sure it was a can-tah, one of the little gods.
- Part 1 / Chapter II / Section 5