A little more than a year after the photo on the preceding page, Geep 5766 was operating on the New York Central's line to Mackinaw City, Michigan. My brother took this transparency on Friday, August 15, 1958, which shows No. 5766 switching Pennsylvania Railroad sleeping cars there. The PRR still had a summer weekend train, the Northern Arrow (discontinued in 1961), serving vacationers to the Mackinac resort area. The two railroads shared the roundhouse, visible in the left background, and probably had a switching arrangement, especially in view of the fact that the PRR was using EMD E and F units instead of road switchers on its line into northern Michigan. A NYC passenger car in the two-tone gray scheme also appears at the left edge of the photo.