Those who like a good mystery ought to set aside time Tuesday to attend the Limestone County Historical Society’s quarterly meeting.

Starting at 6:30 p.m., local history and true crime author Jacque Reeves will offer fresh details on a local legend of sorts — the Rev. Constantine Blackmon Saunders, otherwise known as the X+Y=Z Preacher, and the Rev. George W. Mitchell, who first penned an account of the preacher’s peculiar gifts in 1877.

Often referred to as the Sleeping Preacher, Saunders was known to fall into a trance-like state in which he would describe events that happened far away and write word for word the content of letters yet to be delivered. During his spells, he would tell of the location of lost valuables, diagnose ailments and even prescribe treatments.

He served as the pastor of the Mooresville Brick Church during the mid-1850s and asked Mitchell, a fellow minister who intermittently headed the First Presbyterian Church in Athens from 1853-1882, to document his story.

Most of the copies of Mitchell’s book burned in a Mooresville building fire some time after it was published. Huntsville author William P. Drake gathered whatever copies he could from Saunders’ descendants, publishing a more complete history of the Sleeping Preacher in 1981.

According to Historical Society Vice President Jackie Leonard, some First Presbyterian members had caught word that Reeves, owner of Avalon Tours and co-founder of the Huntsville and Decatur Ghost Walks, had uncovered new information about Mitchell and the X+Y=Z Preacher.

Leonard said a stained glass window at First Presbyterian lies at the center of Reeve’s new discoveries.

According to Leonard, the ornate double window was erected in honor of Mitchell in the last 1800s.

All of the stained glass windows were restored in 2016, but the Mitchell window has to be disassembled one piece of glass at a time to prevent it from crumbling.

Reeves will also share new insights about the X+Y=Z Preacher’s psychic abilities and the religious and social climate in North Alabama at the time.

The Society meeting will take place at the Rodger’s Center at First Presbyterian Church, 112 S. Jefferson St.