The coast of Norfolk, Suffolk, Essex, Kent, Sussex, and Hampshire, where were castles and garrisons, under the charge of a court or military officer, called Comës Lïttoris Saxonici per Britanniam.
Fort Branodunum (Brancaster) was on the Norfolk coast. Gariannonum (Burgh) was on the Suffolk coast. Othona (Ithanchester) was on the Essex coast. Regulbium (Reculver), Rutupiae (Richborough), Dubris
(Dover), P. Lemanis (Lyme), were on the Kentish coast. Anderida (Hastings or Pevensey), Portus Adurni (Worthing), were on the Sussex coast.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Saxon Shore from Fact Monster: