R. Austin Freemans character Dr. Thorndyke is considered the first modern forensic scientist in literature. This is one of the oddities of detective fiction. The first part of this story is an autobiography of Thorrndykes lab assistant Polton. Polton, Dr. Thorndykes lab assistant and a servant has graced every Thorndyke mystery with his mechanical ingenuity, his sumptuous meals and teas, and his crinkly smile. The second part is a mystery tale, which builds on some of the characters we first saw in the earlier portion. Polton and Dr. Thorndyke faced with a mystery involving a mysterious fire in a Soho house filled with supposedly inflammable objects and a body charred beyond recognition by the fire. Poltons understanding of the mechanisms of clocks leads to a breakthrough in the case.