Sarll, after returning from Mexico, found a job as a cameraman for Warwick Film Company. He managed to film (unbeknownst to him) Emily Davison throwing herself under the King's horse in 1913. Sarll persuaded his employers, Pathé Gazette, to send him to Istanbul to film the First Balkan War. Sarll teamed up with Sir Hubert Wilkins to capture pictures of the Battle of Lule Burgas. Narrowly avoiding execution at the hands of the Bulgars, Sarll had to bribe his captors with £400 in gold to let him go. Sarll claimed he had to cut up his films into small pieces to post them in order to avoid the Turkish censors. Sarll returned to England in 1913.