Lester “Speedy” Parker / Parkus

Speedy looks at twelve-year-old Jack Sawyer with a coldness that chills the boy inward all the way to the hidden man’s heart. And when he speaks again, Speedy Parker’s faint southern accent has deepened. It has filled with a contempt that is almost liquid. “You get busy now, hear me?

Black House identifies the remembered Speedy Parker as Jack's old friend who guided him between worlds, matching The Talisman.

Your Fisherman, Jack, is now your ka. Our ka. This is more than murder. Much more.” And Jack sees something that frankly scares the shit out of him. Lester Parker, a.k.a. Speedy, a.k.a. Parkus, is himself scared almost to death. “This business concerns the Dark Tower,” he says.

Black House explicitly states Lester Parker, a.k.a. Speedy, a.k.a. Parkus, identifying the Talisman guide’s aliases.

Down there was his new friend, Speedy Parker, but the boy could not think about Speedy Parker now. To the right was the Alhambra Inn and Gardens, and that was where the boy’s thoughts relentlessly took him. On the day of their arrival Jack had momentarily thought he’d seen a rainbow over its dormered and gambreled roof.

Black House identifies the remembered Speedy Parker as Jack's old friend who guided him between worlds, matching The Talisman.

6 When he had wandered into Funworld and met Lester Speedy Parker after he did not quite know how many days of numbly drifting through time, that passive feeling of being on hold had somehow left him. Lester Parker was a black man with crinkly gray hair and heavy lines cutting through his cheeks.

Black House explicitly states Lester Parker, a.k.a. Speedy, a.k.a. Parkus, identifying the Talisman guide’s aliases.