H. Beam Piper 
Little Fuzzy [EPUB ebook] 

Jack Holloway found himself squinting, the orange sun full in his eyes. He raised a hand to push his hat forward, then lowered it to the controls to alter the pulse rate of the contragravity-field generators and lift the manipulator another hundred feet. For a moment he sat, puffing on the short pipe that had yellowed the corners of his white mustache, and looked down at the red rag tied to a bush against the rock face of the gorge five hundred yards away. He was smiling in anticipation…