drawing from a photograph

I drew this one of worn-out soccer shoes for the teenage son of a clergyman. At the time, the boy was nearing the end of his second year in high school, and had few interests in his life other than soccer. I drew the shoes from a photograph, which is not at all approved among some etegami circles. But sometimes it's the only way. The boy never did acknowledge the card (I didn't expect him to), but I heard later that he was seen showing it off to several of his friends. : )