The cracks grew over him like vines, faster and faster. At first he bucked, whinnying metallic screeches. Then he gradually stilled, looking up at me with frightened glass eyes.He was growing.New, molten glass leeched out between his fissures, cooled and hardened only to crack again and make room for more liquid glass. The gears inside him moaned and creaked, and metal filings gathered at the base of his transparent stomach, only to fly up again and form more joints and chains and gears. Black smoke poured from his nostrils.Soon he was the size of a large dog, then a man, and still he grew and grew until he towered over my bed, as big as any plow horse I’d ever seen. Glass dripped down his flanks like sweat, a few rivulets still glowing with molten heat.