Where's Your Brickwall?

As you work your genealogy back in time you eventually find an ancestor with parents, or one parent, you can't identify by first and last name. In my case my latest brickwall is a great grandparent who just seems to appear, gives conflicting information in censuses and with no trace earlier than the birth of his first known child in the late 1870s. Where's your brickwall? Please click here to take this quick survey.