[Chris Saper]

Dear Mari,

Thanks for your comment and your humor.

I saw a young teenager at the mall recently - her t-shirt said "I could talk all day". I need one of those t-shirts.

I can only try to imagine the intense focus of what you are doing -6 hours would definitely be overload. I think that Bill Whitaker said that 3 hours or so was his max before needing to get away, nap, whatever.

I can usually work about 4-5 hours , then my brain is too tired, and I will start to make mistakes.