And also in passing alongst by any and euery coast, doe you drawe the maner of biting in of euery Bay, and entrance of euery harborow or riuers mouth, with the lying out of euery point, or headland, (vnto the which you may giue apt names at your pleasure) and make some marke in drawing the forme and border of the same, where the high cliffs are, and where lowe land is, whether sande, hils, or woods, or whatsoeuer, not omitting to note any thing that may be sensible and apparant to you, which may serue to any good purpose. If you carefully with great heede and diligence, note the obseruations in your booke, as aforesaid, and afterwards make demonstration thereof in your plat, you shall thereby perceiue howe farre the land you first sawe, or the parts thereof obserued, was then from you, and consequently of all the rest: and also how farre the one part was from the other, and vpon what course or point of the Compasse the one lieth from the other. [Sidenote: For obseruing of tides and curants.] And when you come vpon any coast where you find floods and ebs, doe you diligently note the time of the highest and lowest water in euery place, and the slake or still water of full sea, and lowe water, and also which way the flood doeth runne, how the tides doe set, how much water it hieth, and what force the tide hath to driue a ship in one houre, or in the whole tide, as neere as you can iudge it, and what difference in time you finde betwene the running of the flood, and the ebbe. And if you finde vpon any coast the currant to runne alwayes one way, doe you also note the same duely, how it setteth in euery place, and obserue what force it hath to driue a ship in one houre, &c.