another example of such may be the phrase, "what is, is" or "it is impossible for the same thing to be and not to be". dan believes that their relationship as detective and snitch is "a sacred bond", and does not hesitate to call on him when his criminal abilities are needed, whether for information or to act as a human tracking device. it was linked to the garden pool in 1773 by a lock, and boats could reach hall pool two years later, when a staircase of two locks and a single lock were built. in 1999 it made it onto the list. 