Mack stood, still as a statuesque sentinel, near the fountain in the middle of the main plaza of the Town of Beginnings. For all the Vice Commander's taciturn moodiness his familiar, Chewie the Grizzly Cub, was the picture of rambunctious motion. With a growl the cub went hurtling by his master, leaped high into the air, and then splashed down into the fountain like a fuzzy cannonball. There was a titanic splash and, an instant latter, a fuzzy brown head emerged from the fountain as Chewie paddl