Costello Square is in the Collinsville section of Dracut and at the junction of Lakeview Ave and Mammoth Rd. Here is the notice of his death:
Died during World War One. Buried in Thiaucourt, France.
Lowell Sun, January 11, 1919 p.5
KILLED IN ACTION
Private James S. Costello, Battery C, Dth Artillery, son of Mr. and Mrs. James Costello of Collinsville, has been reported killed in action early in October. He entered the service Sept. 4, 1918, and owing to previous military experience, sailed for France two weekends later. He was 20 years old and leaves his parents and two sisters. Mrs. Daniel Dorris and Miss Rose Costello, both of Collinsville.
I'm bummed that the the sign is so lame........... :-(