Review of the Call of Cthulhu scenario None More Black, written by Brian M. Sammons, from Chaoisum's scenario anthology, Doors to Darkness.

You can find the written review here:

https://mjrrpg.com/none-more-black-review-doors-to-darkness-call-of-cthulhu/

Servants of the Lake can be found in Doors to Darkness, available at:

Chaosium Store: https://www.chaosium.com/doors-to-darkness-hardcover/

DriveThruRPG: https://www.drivethrurpg.com/en/product/199593/Doors-to-Darkness?affiliate_id=3534349

Or your friendly local game store.

And credit to CryoChamber for use of their album 'Cthulhu.' Check out their youtube and bandcamp:

https://www.youtube.com/channel/UCVHOgH4XEyYx-ZEaya1XqCQ

https://cryochamber.bandcamp.com/