MR. EDITOR-- I am hunting for my brother; his name is Peter Harris. He went from Shawne town, Ills., to Helena, Ark., on a steamboat called Delaware. The last I heard of him he was living with a man named F. B. Rodgers, in Philos county, Ark. He belonged to a man in Henry country, by the name of Atkins. His father was a free man by the name of…