A certain writer describes how artillery mules, having brought their pieces into action, are Often found to graze quietly on the turf, concerned only in whisking away the ?ies with their tails, while shot and shell are ploughing furrows in the ground all around them. The mule is not brave, but merely danger-blind. A man may be found who, without any motive to com pensate the risk, will balance himself on the edge of a precipice, or pirouette upon the summit Of a chimney-stack. The man is not brave: he'is merely stupid.