OGILBY'S ROADS, PREFACE 4

In the Delineation or Decyphering these Roads upon Copper-Sculptures:

1. We have Projected them upon imaginary Scrolls, the Initial City or Town being always at the Bottom of the outmost Scroll on the Left Hand; whence your Road ascends to the Top of the said Scroll; then from the Bottom of the next Scroll ascends again, thus constantly ascending till it terminate at the Top of the outmost Scroll on the Right Hand, as by the Succession of Figures representing the Miles, mostly plainly appears.

2. The Road itself is express'd by double Black Lines if included by Hedges, or Prick'd Lines if open; but if the Road be describ'd altogether by Black Lines or Prick'd Lines throughout the whole Plate, then the Distinction aforesaid of Enclos'd and Open is omitted.

3. The Scale by which the said Road is Protracted, is according to one Inch to a Mile, or the 63'360th. Part of a Mile; the said Miles being exprest by double Points, and numbred by the Figures 1, 2, 3, &c. Each subdivided into 8 Furlongs, represented by the single Points included between the said double Ones.

4. The several Deviations or Turnings out of the Road to adjacent Places on either Hand, are exprest by a short double Line, and are generally inscrib'd, to such a Place, and sometimes the reputed Distance of the said Place in Miles is likewise signify'd by Figures affixt.

5. Capital Towns are describ'd Ichnographically, according to their Form and Extent; but the Lesser Towns and Villages, with the Mansion Houses, Castles, Churches, Mills, Beacons, Woods, &c. Scenographically, or in Prospect.

6. Bridges are usually noted with a Circular Line like an Arch, but are generally imply'd where the River or Brooks crost are not drawn through the Road.

7. Rivers are Decypher'd by a treble wav'd Line or more, and the lesser Rills or Brooks by a single or double Line, according to their Eminency.

8. Ascents are noted as the Hills in ordinary Maps, Descents e contra, with their Bases upwards.

9. Whatever is posited upon or within the Scroll, is presum'd to bear the same Scale as the Road it self.

10. The several Inclinations of the Road to the one or th'other Hand, are naturally express'd accordingly, and the Points of Bearing are Collected from the peculiar Compass of each Scroll, the Flower-de-luce shewing the North; and when a Compass is repeated in the self same Scroll, a straight transverse Line expresses to what Part of the Scroll either of the said Compasses belong.