Furthermore, the said riuer floweth and filleth all his chanels twise in the daie and night, that is in euerie twelue houres once; and this ebbing & flowing, holdeth on for the space of seauentie miles, within the maine land: the streame or tide being alwaies highest at London, when the moone dooth exactlie touch the northeast and south or west points of the heauens, of which one is visible, the other vnder the earth, and not subiect to our sight. These tides also differ in their times, each one comming latter than other, by so manie minuts as passe yer the reuolution and naturall course of the heauens doo reduce, and bring about the said planet vnto those hir former places: whereby the [Sidenote: The iust dist[=a]ce betwéene one tide and another.] 36 common difference betwéene one tide and another, is found to consist of twentie foure minuts, which wanteth but twelue of an whole houre in foure and twentie, as experience dooth confirme. In like sort we sée by dailie triall, that each tide is not of equall heigth and greatnesse: for at the full and change of the moone we haue the greatest flouds, and such is their ordinarie course, that as they diminish from their changes and fuls, vnto the first and last quarters; so afterwards they increase againe, vntill they come to the full and change. Sometimes also they rise so high (if the wind be at the north or northeast, which bringeth in the water with more vehemencie, bicause the tide which filleth the chanell, commeth from Scotland ward) that the Thames ouerfloweth hir banks néere vnto London: which hapneth especiallie in the fuls and changes of Januarie and Februarie, wherein the lower grounds are of custome soonest drowned. This order of flowing in like sort is perpetuall, so that when the moone is vpon the southwest and north of points, then is the water by London at the highest: neither doo the tides alter, except some rough winds out of the west or southwest doo kéepe backe and [Sidenote: The streame oft checked in hir entrance into the land.] checke the streame in his entrance, as the east and northeast do hasten the comming in thereof, or else some other extraordinarie occasion, put by the ordinarie course of the northerne seas, which fill the said riuer by their naturall returne and flowing. And that both these doo happen eft among, I refer me to such as haue not sildome obserued it, as also the sensible chopping in of thrée or foure tides in one naturall daie, wherof the vnskilfull doo descant manie things.