Wyndelius Gatharian

 is a NPC encountered in The Elder Scrolls V: Skyrim.

Description
Wyndelius Gatharian is a male Dunmer found in Shroud Hearth Barrow. Apparently he disappeared after entering the barrow some time ago.

Actually, he journeyed into the Barrows in search of the Sapphire Dragon Claw. He wanted to stay within the Barrows, and fooled the villagers into believing the Barrows was haunted by, at first, rattling some pots to scare away a villager. Then, he created a potion that made him have the appearance of a ghost, walked outside the Barrow and waved his arm about, scaring the villagers. However, he soon grew mad, possibly as a side effect of the potion, and eventually began believing that he was the guardian of the Barrow.

He will start telling you to "leave this place...leave this place" once you get to the first room.

Quest

 * In Ivarstead you are given a quest to investigate a haunting in the Shroud Hearth Barrow.
 * Upon investigating the Shroud Hearth Barrow you encounter the spirit of Wyndelius, warning that you leave at once.
 * You can retrieve the Wyndelius's Journal which is found within his living quarters, shortly into the barrow.