Linda Craig

Linda Craig and the Clue on the Desert Trail by Ann Sheldon, 1962.
Linda and her friend, Kathy, are exploring Olvera Street in Los Angeles before a horse show when Kathy notices a strange man watching them. While the girls were shopping, Linda bought a small horse statue that reminded her of her own horse. As the girls finish lunch, Linda notices an odd symbol on the statue that looks like an arrowhead, but before she can study it more, the man grabs the horse and runs off. Linda tries to chase him down to get the horse back, but the man drops it and breaks it. Linda picks up the horse’s head and decides to go back to the shop where she bought it to see if she can get another one.
The shop doesn’t have another horse like the one Linda bought. It was unglazed, and the others are glazed. Disappointed, Linda goes on to the horse show, where she is taking part, along with her brother Bob and his friend Larry. At the show, they see the mysterious man again, and he apparently steals the broken head of the horse statue that Linda had kept. Bob thinks that maybe the man is some kind of smuggler and that there was something hidden in the head that Linda hadn’t noticed.
Linda goes back to the shop to talk to the owner again, and he tells her that the horse was a special order from Mexico for a man named Rico. Rico said that he was a traveling salesman and that he would collect the horse at the shop, but when he didn’t turn up to get it, the shop owner decided to sell it. Linda asks the shop owner to send her another horse statue like the broken one if one comes into his shop and reports all of this information to the police. Then, when she returns to the horse show, she finds a threatening message, warning her to “Beware. Stay away from C. Sello.” The note is signed with the symbol of an arrowhead, similar to the one on the horse statue. Linda also reports this note to the police, but she can’t resist trying to figure out who C. Sello is and how this person fits into the mystery of the possible smugglers.
Soon after, the shop owner calls Linda to say that another horse statue did come into the shop and that he has sent it to her but now someone has broken into his shop and smashed every horse statue he has. Realizing that what they wanted was not in the shop, the bad guys are soon on Linda’s trail, even kidnapping one of her friends by mistake, thinking that it’s her. They even try to poison Linda’s horse!
At the end of a desert trail, the Mojave Trail, there is a ghost town with sinister characters and old cliff dwellings with Native American petroglyphs that may hold part of the secret to the mystery.
The story contains some anecdotes about California history, which is interesting. I have to admit, though, that I thought that the warning note for Linda was pretty silly. C. Sello turns out to not be a person but a clue about what the smugglers are smuggling, and they didn’t have to tell Linda what it was because she hadn’t heard about it at that point and wouldn’t have any reason to know what they were talking about. If they really wanted to get her to leave them alone, they could have left a more vague warning that didn’t include any clues like “Go home!” or “Go away!”