A Bertram Bile time travel adventure series, set along the length of the River Thames.
When a milkmaid spots two deadly shrews close to her prized cow, their death is the only thing on her mind. Little does the milkmaid know that the shrews are 11-year-old time travelers Bertram and Molly. What will the milkmaid do to Bertram and Molly if she catches them? Could this be the end of our magical time-travelling duo? Based on the actual British folklore of the "shrew ash" long believed to be a cure for a lame cow.