General James Shields and his staff gathered in the parlor of the local hotel in mid-May 1862. Boyd hid in the closet in the room, eavesdropping through a knothole that she enlarged in the door. She learned that Shields had been ordered east from Front Royal, Virginia. That night, she rode through Union lines, using false papers to bluff her way past the sentries, and reported the news to Colonel Turner Ashby, who was scouting for the Confederates. She then returned to town. When the Confederates advanced on Front Royal on May 23, Boyd ran to greet Stonewall Jackson's men, avoiding enemy fire that put bullet holes in her skirt. She urged an officer to inform Jackson that "the Yankee force is very small [...] Tell him to charge right down and he will catch them all." Jackson did and wrote a note of gratitude to her: "I thank you, for myself and for the army, for the immense service that you have rendered your country today." For her contributions, she was awarded the Southern Cross of Honor. Jackson also gave her captain and honorary aide-de-camp positions.