My ggggggrandfather served in the 8th Penna Continental Line, 2nd Lt., #37391437.
The American Guthrie by Laurence Rawlins Guthrie p216:
Says a legend, he [James Guthrie] collected a band of men, and aided the Continental Army at probably the Battle of the Brandywine. There is no official record of this.
James Guthrie is buried at the Forks of the Brandwine Presbyterian Church cemetery in Guthriesville, PA.