When you cannot find a record in the expected location, ask yourself if you are really certain the event took place in that spot. Do you have good information to cause you to believe that or are you operating under a hunch? That hunch could be wrong. Did a couple go a distance from home to elope? Did your great-grandparents live in another state for a year and that’s where one child was born? Was great-grandma living with a daughter out of state when she died? The event may not have taken place where you think it did–especially if if happened one hundred years before you were born.