I was recently given an album by Mari Carmen which she put together for me, full of crochet samples which her grandmother (Alvaro's great grandmother) Carmen Matias Rodriguez made over her life time. It's amazing, there are hundreds of them and these are just the samples. Apparently she was always crocheting and always had a hook and thread with her. If she saw a crochet design in a shop she liked she would go in make a quick sample.
It was the most beautiful present! and I've been looking at it everyday since. So far I have copied a circle design to add to a necklace I'm working on at the moment. It's a never ending source or crochet designs.