At the time, the services of a destitute prostitute like Polly Nichols could be had for 2 or 3 pence or a stale loaf of bread. 3 pence was the going rate as that was the price of a large glass of gin.
3:15 AM -- PC John Thain, 96J, passes down Buck's Row on his beat. He sees nothing unusual. At approximately the same time Sgt. Kerby passes down Buck's Row and reports the same.