After gathering all the needed materials, Bentley was able to create Sly's Archer Costume that he could use in breaking Sir Galleth Cooper out of the circus. Bentley had located an entrance to the circus tent Galleth was in, and Sly climbed up to the top of a nearby tower for a better vantage point. Once there, he equipped the Archer Costume and used it to clear a gap and get to the top of the circus tent.
Inside, Bentley told Sly that he would need to stay off the floor of the circus tent, as it was rigged with motion sensors. Sly utilized the Archer Costume to help him traverse the tent and get to the platform where Bentley suspected Galleth was. He indeed found Galleth there and they went back to the safe house.