THREE BOYS AND A MINE

Here are the triplets Abercromble, Benjamin and Christopher (of Three Boys and a Lighthouse, Three Boys and a Tugboat etc.)-looking as bright and identical as ever and just as excited about coal as they were about the sea. Off they go, on the bus, with their dog John Paul Jones, to visit their cousin Pop Robbl who's safety inspector for the Bonyville anthracite mine. They make new friends, dig coal themselves and help rescue a little girl from a cave in before they go gaily home again.