I do not believe there is any such sixth sense. A man with a good sense of direction is, to me, quite simply an able pathfinder - a natural navigator - somebody who can find his way by the use of the five senses (sight, hearing, taste, smell and touch - the senses he was born with) developed by the blessing of experience and the use of intelligence. All that pathfinder needs is his senses and knowledge of how to interpret nature's signs.