Tedric is a sci-fi & fantasy novel by E. E. Smith, published in 1953. Tedric, our hero, is a smith (both blacksmith and whitesmith) residing in a small town near a castle in a situation approximately equivalent to England of the 1200s. He received instruction in advanced metallurgy from a time-traveler that wanted to change the situation in his own time by modifying certain events of the past. From this instruction he was able to build better suits of armor and help defeat the villains of the piece... Experience a great entertainment by an old master of the genre!