There's nothing like a newspaper for spreading disease. You wake up in
the morning, feeling fit to do a day's digging on your allotment; you
come down to your breakfast singing a Rhonddalay and eat more than your
allowance. Then you open the newspaper, glance at the latest accession
to the ranks of the Allied Powers, and suddenly, "Plop!" you find there
is a new disease raging, and before you know where you are you discover
that you have got it badly.
That is how I discovered that I was the possessor of a heart murmur. By
putting my hand on the spot under which I had been taught, and still
believed, my heart to be, I felt rather than heard a distinct burbling.