Since then I've ridden many times with an umbrella. It's a little challenging to do while shifting and braking. Consequently, I have always thought that someday I'd figure out a way to attach an umbrella to the bicycle. Well, thanks to Dutch ingenuity, I don't have to!
Now a company in Amsterdam - Drycycle - is making an umbrella attachment for bicycles! Thanks Drycycle... I know what I want for my birthday!