“On a cold January morning, I once asked a fashionably dressed middle-aged woman, standing outside a building on Madison Avenue smoking a cigarette and shivering, whether she had a pen I could use. She didn’t think this was an odd request and was happy to oblige me. After she extracted a pencil not much bigger than a matchstick from her purse, I took out a little notebook I carried in my pocket, and not trusting the reliability of my memory, wrote down some lines of poetry I had been mulling over for the previous hour, roaming the streets. Today, she’d probably be staring at an iPhone or a blackberry while puffing away on her cigarette and it would not cross my mind to bother her by asking for a pencil.”