Three Knocks at Night: The 1937 Jar Beneath Hollow Bend

Three Knocks at Night: The 1937 Jar Beneath Hollow Bend

Cold, rhythmic knocking in the dead of winter drew people out into single-digit temperatures: three knocks, a ten-second pause, three more, always from beneath the north floorboards. The sound persisted across a year, recorded in a forty-seven-entry log, and led to a buried sealed glass jar from 1937 - but who placed it there, and what the tiny key inside opens, remains unknown.

In this episode, we tell the documented chain of events from the first 2:47 a.m. report through the independent verification and the ground-penetrating radar finding, showing how routine notes and a runner’s log became the paper trail that cracked the case. How did a jar buried over four feet deep in 1937 cause nights of knocking in 2013-14, and why does the record end with a question?

Person: Nicole Holmes, 38-year-old electrician Location: Hollow Bend Farm, outside Calverton, Indiana Period: Winter 2013-2014 (sound began November 2013) Case: Runner's log with 47 entries kept by Lisa Sheridan Event: Sealed glass jar buried more than four feet underground since 1937

- The first recorded knock occurred at 2:47 a.m. on a night when the temperature dropped to 15 degrees. - Lisa Sheridan’s runner’s log reached 47 entries by October 2014, each with date, time, air temperature, and sound description. - The knocking pattern was three knocks, a pause of roughly ten seconds, then three more, repeatedly. - A sealed glass jar buried more than four feet underground dated to 1937 contained a key and a folded document. - Ground-penetrating radar and a soil engineer provided the physical explanation after a year of unresolved reports.

To listen to this podcast ad-free and access premium episodes, try our subscription with a 14-day free trial at obomedia.com.

© 2026 OBOMEDIA. All rights reserved. This episode and its content (audio, text, and related materials) are the exclusive property of OBOMEDIA and are protected by applicable copyright laws. Reproduction, distribution, editing, or commercial use, in whole or in part, without prior written permission from OBOMEDIA is prohibited. For permissions, licensing, and business inquiries: [email protected].