Another boat, a straight-four, four sweep oarsmen without a coxswain, raced through our flotilla. I looked at them as they jetted past, and I quickly looked again. This boat appeared to be manned by four skeletons. Their cheek bones stood out like knots, their ribs were clearly defined as if they were painted on. Every leg and arm muscle showed as taut as steel cabling. Four pairs of deep-set eyes peered at us, conveying 'the look.' The four men who were rowing that shell were a special breed of oarsmen known as 'lightweights'.