Si (hi the Origin and Distrilmtion uf the British Flora. 



Cambridgeshire border, and flows eastward to Wixoe, where 

 it begins to form the boundary between Suffolk and Essex. 

 Its di'ainage-area is variously stated at 430 or 407 square 

 miles, most of which is in Suffolk, and its length as 45 or 55 

 miles : probably the smaller number is the true one in each 

 case. Its chief tributaries are the Suffolk rivers, Brett, 

 Boxford, and Orwell, but from Essex it receives four small 

 streams : one above Sudbury, from Ovingten, Wickham 

 St. Paul, and Belchamp Water ; another below Bures, from 

 Pebmarsh ; a third at Neyland, fi*om West Wood Green ; 

 and, below Langham, one from Boxted Heath. 



In the seventh and last sub-province, the Brook rises 

 between Debden and Ugley, and flows northward, receiving 

 the water from Debden Lake, through Quendon, Newport 

 (where it receives a stream from Arkesdon), Wendon (where 

 it receives another, also on its left bank, from Chishall and 

 Wendon Lofts), and Audle}^ End, where it receives the 

 Slade, to Chesterford, where it leaves the county. The Slade 

 rises between Hadstock and Little Chesterford, and flows 

 under the town of Saffron Walden. The Brook is a tributary 

 of the Cam or Granta, and is spoken of hy both these names. 

 Probably Granta is merely a scholastic form of the name 

 Cam, as Isis has been coined at the sister University. The 

 main stream of the Cam rising in North Hertfordshire is 

 sometimes terined the PJiee. The question as to which of 

 these sources and streams is the main river is, like that 

 between the Chui'n and the Thames Head Brook, one of no 

 real importance or i^ossible solution. Such being the prin- 

 cipal watercourses of the county, my sub-provinces depend 

 upon their watersheds, as follows : — 



Suh-procince 1 — Lea and Stort. From 7, by line from 

 Little Chishall to Langley, Piickliug, Ugley, and Henham- 

 on-the-Hill ; fi'om 2 and 4, by this line continued to Broxted, 

 Little Canfleld, White Boding, High Laver, North Weald, 

 Epping, High Beach, Walthamstow, Wanstead, East Ham, 

 and North Woolwich. 



Suh-province 2 — Boding ajid Small Thames ajjiuents. From 4, 

 by line from Broxted, through Easton Park to High Easter, 



