 Vernet reveals that he had briefly corresponded with the detective posing as a man named "Sigerson", offers suggestions for future undercover work and compliments several papers that the detective had written, including "The Dynamics of an Asteroid".Vernet, who also uses the alias "Rache", also details horrors that he has witnessed being committed by the Great Old Ones as justification for the crime.As Lestrade rushes off to search for Vernet and the limping accomplice (tentatively identified as a former military surgeon named John (or maybe James) Watson), the detective admits that it is unlikely that Vernet has left the city, having probably elected (as the detective would) to hide in the lawless depths of the rookery of St. Giles until the search is abandoned.