Wherefore I beséech your honour to pardon this imperfection and rudenesse of my labour, which notwithstanding is not altogither in vaine, sith my errors maie prooue a spurre vnto the better skilled, either to correct or inlarge where occasion serueth, or at the leastwise to take in hand a more absolute péece of worke, as better direction shall incourage them thereto. The entrance and beginning of euerie thing is the hardest; and he that beginneth well, hath atchiued halfe his purpose. The ice (my lord) is broken, and from hencefoorth it will be more easie for such as shall come after to wade through with the rest, sith "Facile est inuentis addere;" and to continue and finish, is not so great a matter in building, as to attempt and laie the foundation or platforme of anie noble péece of workmanship, though [Sidenote: Thamesis.] it be but rudelie handled. But to my purpose. As I began at the Thames in my description of Ilands, so will I now doo the like with that of famous riuers; making mine entrie at the said riuer it selfe, of whose founteine some men make as much adoo, as in time past of the true head of Nilus, which, till of late (if it be yet descried) was neuer found: or the Tanais, whose originall was neuer knowne, nor shall be: for whilest one placeth it here, another there; there are none at all that deale with it exactlie. Wherefore leaning to such mens writings as haue of set purpose sought out the spring of the Thames; I affirme that this famous streame hath his head or beginning out of the side of an hill, standing in the plaines of Cotswold, about one mile from Tetburie, néere vnto the Fosse (an high waie so called of old) where it was sometime named Isis, or the Ouse, although diuerse doo ignorantlie call it the Thames euen there, rather of a foolish custome than anie skill, bicause they either neglect or vtterlie are ignorant how it was named at the first. From hence it runneth directlie toward the east (as all good riuers should) and méeteth with the Cirne or [Sidenote: Corinium.] Churne, (a brooke called in Latine Corinium) whereof Cirncester towne (by which it commeth) doth take the denomination.