Found out today I had a flat. The tube is patched up and here are the pictures to the tire. What caused the flat was a tiny sharpo/flat piece of pebble. The tires are 27x5/4" and looking pretty old. Should I just keep the tire and see if I get any more flats or just replace it with some Specialized Armadillo's? Tread on the front looks decent but back is flatter.
Taking a tip from Siu Blue Wind, I too am typing a lengthy passage of text down here to demonstrate the enormous amount of space available should one wish to use it-- in sharp contrast to the avatar text above this part.
rockhopper, delta V, cannondale H300, Marin Mill Valley
A cut like that can happen to new tires too, even kevlar belted ones. Replace the tires because of the dry rot (although it's still rideable it could fail). The hole looks too small to even need a boot, generally a puncture this size is nothing to worry about after the tube is patched or replaced.