To avoid violating Edison's patents, Biograph cameras from 1895 to 1902 used a large-format film measuring 2-23/32 inches (68 mm) wide, with an image area of 2 × 2½ inches, four times that of Edison's 35 mm format. Biograph film was not ready-perforated; the camera itself punched a sprocket hole on each side of the frame as the film was exposed at 30 frames per second. "Sherlock Holmes Baffled" ran to 86.56 metres in length, giving the film a running time of 30 seconds (although in practice, due to the hand-cranked gearing of the Mutoscope this would have varied).