346 Yorkshire Natural History 200 Years Ago. 
all along the Shore about Whitby, are almost continually busy 
to make after this Manner. They gather the Sea-Wrack and 
lay it on Heaps, and when it is dry, they burn it ; while it is in 
burning they stir it to and fro with an Iron Rake ; and so it 
condenses and Cakes together in such a Body, as they call 
Kelp, which is also of use in making of Allum ; if they should 
not stir it, it would burn to Ashes as other Combustible Matter 
does. 
3. Waters, of which the four great Rivers, which with the 
Rivulets and Brooks that empty themselves into them, supply 
this Riding with Plenty of Water, as well for Pleasure and 
Profit as Use, deserve the chief Place. They are, 1. The Tees. 
2. The Swale. 3. The Ure. And, 4. Derwent, of which we 
shall briefly insist, viz. 
1. The Tees rises in the Bishoprick of Durham, but having 
received the Rivulet of Lune, which rises in Lune Forest, 
and some other Brooks, becomes a Part of this Riding at Rokcby 
where the River Grata falls into it, and divides it from the 
Bishoprick, and after a considerable long Course, with many 
Windings falls into the German Ocean ; some noted Towns 
on the side of Durham stand upon it, but none on this, but 
Yarum, a small Market -Town. By it the Villages, which 
stand pretty thick upon its Banks, are plentifully supplied with 
Salmon, and Fish of diverse other Sorts. 
2. The Swale, so called, say some, from its Swiftness, falls 
into the Ure with a great Leaping of Waters near Myton ; 
it rises out of the Western Mountains, scarce five Miles above 
the Head of the Ure, and runs to the Eastward. It was very 
Sacred among the Saxons, because when they were first con- 
verted to Christianity, there were baptized in it, in one Day, by 
Paulinus, Archbishop of York, to their great Joy, above Ten 
thousand Men, besides Women and Children. The Course of 
this River lies through a pretty broad Vale, which from thence 
is called Swaldale, which has Plenty of Grass, but wants 
Wood. From thence it holds on its Course to Richmond, the 
Chief City of the Tract or Shire called Richmondshire ; after 
which there is in it such a great Fall of Water, as deserves the 
Name of a Cataract, because the Waters rather rush than run 
there, being dashed and broken by the Rocks in its M ay. A 
little Village standing near it there, called C.atarrick may seem 
to take its Name from it. This River also affords great 
Variety of Fish to the Inhabitants near it. 
3. The Ure, which hath its Rise out of the Western Moun- 
tains, not far from the Original of the Swale, and first runs 
through the middle of the Vale, called Wentsdale. which is 
plentifully stocked with Cattle, and in some Places affords 
Lead : A little Distance from its Spring, while the Current is 
yet but small, it is increased by the Rivulet Baint, from the 
Naturalist, 
