Happy Birthday Leonardo

Leo, my good man,
Happy five hundred and fifty third brithday!

I must confess I forgot, but our good friend Google reminded me. All always remember what you said about flying:

When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.

It is true, now moreso than ever, literally and figuratively. As it happens I am flying tonight to London, for the weekend.

Warmest regards,
Mark

P.S. The clock stopped again.