The caption reads: A 50-year old prisoner receiving 30 lashes at Greenbank.  This photograph, appearing in the Philadelphia Record, January 20, 1930, Led to passage of a law prohibiting photographing of whipping.
Adapted from a photo appearing in Red Hannah.   On the original image, the faintest of marks appear on the man's bared back.  As stated previously, these 20th century Delaware whippings appear to be nothing compared to those of earlier times.  The Warder, however, does seem to be dressed for the event.