Publisher's Synopsis
It was some time before the health of my friend Mr. Sherlock Holmes recovered from the strain caused by his immense exertions in the spring of '87. The whole question of the Netherland-Sumatra Company and of the colossal schemes of Baron Maupertuis are too recent in the minds of the public, and are too intimately concerned with politics and finance to be fitting subjects for this series of sketches. They led, however, in an indirect fashion to a singular and complex problem which gave my friend an opportunity of demonstrating the value of a fresh weapon among the many with which he waged his life-long battle against crime.
