Some Additional Notes on Essex Watersheds. 133 
Potter Street and Eye-liill Common, thence southward to 
Epping Union, and then almost along the line of the New 
Eoad, but crossing Ambresbury Banks and round to the 
west of the head of the Wake Valley Pond and of Warner’s 
Pond, Woodford, down Gilbert’s Slade to Forest Lodge, west 
of Leytonstone Station, to Forest Gate Station, North End, 
to East Ham Station and over East Ham Levels to North 
Woolwich. 
Contrary to what is stated in my former paper (Trans, 
ii. p. 81), the Ingrebourne originates in several streamlets 
between South Weald and Navestock, which uniting flow to 
the west of Upminster and Bainham into Erith Beach. A 
smaller stream flows from Stubbers, between North and 
South Ockendon, into the Thames below Bainham. 
The Mardyke may be said to rise in Thorndon Park, 
receiving streams from Dunton Waylett and the northern 
slope of the Langdon Hills, and being joined at Bulphan by 
considerable streams from Brentwood and Childerditch, and 
from Cranham and Great and Little Warley. It then flows 
past Stifford and Aveley to Purfleet. Other small streams 
drain the southern slope of the Langdon Hills, partly into the 
creeks west and north of Canvey Island. 
The watershed dividing the Boding and these streams from 
the Chelmer system, starting from between Elsenham and 
Tilty, passes to Woodgate and Little Easton, east of Easton 
Park, between Elms and Hurts to High Boding, east of 
Aythorp Boding, Leaden Boding, Margaret Boding, Berners 
Boding, Shellow, Willingale Spain, and Norton Mandeville, 
west of Fingrith Hall, Blackmore, and Doddinghurst, hut 
east of Stondon Massey and Navestock , to Bryces , and not as in 
map (pi. vi.) to paper in vol. ii. of the ‘ Transactions,’ and east 
of South Weald and Brentwood Church to the east side of 
Thorndon Park. This basin is then separated from the 
valley of the Crouch by a continuation of the same line between 
East Horndon and Dunton Waylett to Nightingales, south of 
Vange Hall, north of Pitsea Station and of Bowers Gifford, to 
Jervis and Hadleigh Castle, north of Leigh and of Snell’s 
Farm, south of Milton Hall and Southchurch, to Shoeburyness. 
