Surprising as it may seem to us today, roads were not usually included on early maps. It was not until the second half of the seventeenth century that maps become commonly used as travel aids. Previously, ‘travailers’ venturing beyond their home territory would have hired local guides, asked for directions or followed written itineraries which listed the places through which they needed to pass. In 1625 John Norden published a set of triangular distance tables, invented as a guide for travellers. Fifty years later, in 1675, came another innovation - the publication of John Ogilby's Britannia, containing strip-maps of the post roads of England and Wales.