Found this link sprayed on a patch of jungle along with a basic report? Read on:
"This patch of jungle has been marked for clearing by Logger Jack."
"Providing your settlement with wood products. Always."

This is Logger Jack, your friendly neighborhood lumberjack.

Hey, the jungle grows back extremely fast. There's no harm in cutting it down.

Who knows where the path leads? He's just hacking at the trees because that's all he can do. Other than be a boozehound.

Please note that he's retired to some ruins near a river close to a settlement, but he's forgotten everything besides how to differentiate the two rooms in the ruins. Hey, shut up. A tree fell on his head.