The belt buckle's barred, although it gave me a shock when the bullet met it.

A small bullet went through the flesh of my left arm just above the elbow.

It healed so fast that I've hardly noticed it, due, of course, to the very healthy and temperate life I've led.

I suppose, George, it would have laid up a fellow of your habits for a week." "Never mind about my habits, but go on with the list of your wounds.
A great beauty of mathematics is that it compels you to keep to your subject.

When you're solving one of those delightful problems in mathematics you can't digress and drag in irrelevant things.