Little Brick is near Harrisville, in Cecil County, MD, one and one quarter miles southwest of Rising Sun Maryland. Probably named after the West Nottingham Meeting House, aka Little Brick Meeting house. See: https://mht.maryland.gov/nr/NRDetail.aspx?NRID=411
Source: The Historical Society of Cecil County. 2012 email correspondence between them and Reynolds-18565: "Little Brick is near Harrisville, one and one quarter miles southwest of Rising Sun Maryland." "It is "common knowledge" in the area about Little Brick. It is a small county and everyone in the area still refers to it as Little Brick."