The Dead Trilogy Competition

Thanks to the largesse of those kind people at Allen and Unwin and Serpents Tail, I recently received a couple of copies of the trilogy edition of Dead I Well May Be, The Dead Yard and The Bloomsday Dead. The books look fantastic in this edition and the covers and artwork are consistent throughout. I'm keeping one set for myself but I thought I might as well give the other set away. It isn't available in the US (Dead I Well May Be isn't even in print in the US) so this might be a nice get for someone. They are all first editions and of course I'll sign them. It might be worth a few bob one day especially if I go onto fame or infamy.
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Ok it's fairly simple competition. I lived in New York for seven years and Dead I Well May Be mostly takes place there. To get to know the city, one day I decided to walk the whole length of Broadway from the top of Manhattan to the bottom. I stopped off to eat a couple of times and there were a couple of bathroom breaks but mostly it was just me walking. My question is this: how long did it take? I noted my start time way up on 220th street and my finish time when I met the missus at South Ferry. The person closest to my time in hours and minutes gets the books. Just leave your guess and name and an email address in the comments below, or if you have a blogger account just your name, answer and tick the email follow on button.
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Unless someone gets the exact time in hours and minutes the competition will close forty eight hours after this post goes up and I'm only going to allow one guess per person. Finally, here's a wee hint: I did the walk all on one day but it took much longer than I was expecting. Good luck!