LIST OF ILLUSTRATIONS. 
PLATES. 
I. Map of England and "Wales showing the extent 
of the Earthquake of 1884 . To face p. 23 
II. Iron Weapons found near Astwick. ,, p. 39 
III. Samian Ware found near Astwick.| Between 
IY. Eoman Pottery found at Great Wymondley .. ) pp. 40 & 41 
Y. Plan of Eoman Yilla excavated near Hitchin, 
Nov. 1884 . Between pp. 44 & 45 
VI. Map of the Orbits of the Planets round Watford 
Church as the Centre . . . . . To face p. 97 
WOODCUTS. 
Section along the New Line from Pinner to Eick- 
mansworth .p. xxvii 
Cecidomyia destructor , Say (Hessian Ely). Enlarged 
and natural size . . . . . . .. 180 
Process of C. destructor . 183 
Process of C. tritici . . . . . 183 
Earley plant injured by C. destructor .. .. . . 186 
Puparia of C. destructor in situ. 186 
