Sept. 16, 1925
Reginald Wilkins, Marius Albertoni, Dr. Morgan, Dr. Clark, BOI Agent William Mulder

The elevated train rattles through New York before being swallowed in tunnel darkness on its way to Brooklyn. The consulting investigators and BOI Agent Mulder have spent the morning in transit, traveling from Providence, RI, to New York City's Grand Central station, where they switched to a local train for the trip across to Brooklyn.
Agent Mulder briefs the men along the way...
"This cult - we've been puzzling together clues with the help of you consulting investigators, what we found at Carcosa's and Club Zothique. We have several real leads of activity in Brooklyn, New Orleans and Phoenix. This cult has drug connections, ritualistic murder ceremonies and a pseudo-language. Just what these nut-cases want and why is still unknown. In Red Hook we hope to find out more about Chertovski, the Shunned House, his part in the cult and relation to Carcosa. Maybe we'll find the bastard here."
"Carcosa's letters reveal other tentacles of the cult beast, figuratively speaking, in Brooklyn at the mysteriously named Shunned House, London at the Church of Starry Wisdom, and locations in New Orleans and Phoenix. The deceased Agent Baines' office and rooming house room contained missing letters of Carcosa. Why Agent Baines purloined those letters, we're not sure, though Isaiah Bartlett claims Baines was under the influence of the cult."
"Now there is no local police file on Konstantin Chertovskii. That means he hasn't been convicted or connected to any crimes. Chertovskii is a retired man in his early 50s, alledgedly a philosopher and supporter of the arts. The "Shunned House" is an old sprawling Victorian known as the site of a double murder 25 years ago. Chertovskii is the current owner of the house."
"At minimum, we suspect Chertovski to be involved in the movement of stolen goods across state and international lines. From a Konstantin Chertovskii letter to Ubaid Hazrabad (found by Sam Archer on The White Ship):
"Received the goods and will distribute as discussed. Sources tell us it has been found. Get to Mt. Latmos and secure. Give greetings to our colleagues, they shoukd go if necessary.
Cthulhu fthagn brother,
Konstantin"
"Given the evidence of a letter from Konstantin Chertovski letter found in Carcosa's apartment, on letterhead from the Shunned House (16 Shady Lane, Brooklyn, NY), we suspect Chertovski to be involved in Carcosa's operation. From there, we could assume the cult, though we have no proof of murders by anyone other than Timothy Carver, a wino in Boston, and an unknown assailant in Arkham."
"Anyway, Chertovski's letter to Carcisa references import and export of unspecified goods in the U.S. (Boston, New York, New Orleans, Phoenix) and abroad (Amsterdam, London, Brugue/Belgium, Instanbul/Turkey). Discussion of museum collections. The Russian cites particular museums and collections that match those that were victims of thefts. There is only one museum and item mentioned that has not been victim: Harvard's Peabody Museum in Cambridge, Massachusetts, and their fragment of the Codex Beltran-Escavy."
"In Brooklyn we'll be met by New York Police Detective Tom Malone, who'll give us the local perspective and show us around. While we have the cooperation of the local police, this is a BOI matter."
"Any questions or comments?"