INTRODUCTION. XI 



Heatts and Pinner Hill. Stanmore Heath and Higliwood, the highest 

 parts of this range of hills, are also the points of greatest altitude in 

 the county. 



There is anothf-r shorter and somewhat lower range of hills about 

 4 miles from the Thames, to the north-east of London. These are 

 the Highgate and Hampstead Hills. Their highest point is that part 

 of Hampstead Heath near where Jack Straw's Castle stands. Besides 

 these there is no other considerable eminence in Middlesex, except the 

 isolated hill on which the old church of Harrow stands. 



The following heights above the mean sea level have been supplied 

 from the Kecords of the Ordnance Survey, through the kindness of 



its director, Colonel Sir Henry James : — 



' Feet 



County boundary stone at Hart's Bourn (on Bushey and Watford 



Eoad) 



504 



104 

 920 

 491 

 337 



583 



Stanmore Heath, guide-post at north corner of Bentley Priory . 492 



Rising Sun public-house, Highwood Hill 443 



Hampstead Heath, mark on fourth milestone from St. Giles's pound 441 



Hampstead Heath, mark on brick wall 7 chains east of Castle Hotel 440 

 Hampstead Heath, at junction of road to Child's Hill, near Castle 



Hotel 436 



West entrance to Pinner Hill House, Watford Road . . . 436 



Original toll-house, Highgate 424 



Mr. Foyne's (grocer) house, east side of road, Highgate . . 417 

 St. Michael's chureh-tower, Highgate (base) . . . .416 



Harrow-on-the-Hill church-tower (base) 405 



Gate at entrance to Mill Hill Church 402 



Entrance to Mr. Johnson's house, Mill Hill .... 401 



South entrance to Pinner Hill House 381 



Guide-post at junction of roads to Mount Pleasant, Highwood Hill 297 



New church, Harrow-on-the-Hill ...... 292 



Mark on post of wooden seat on top of Primrose Hill . . .219 

 South-east angle of wall of reservoir on Barrow Hill . . .161 



Junction of Barnsbury Park and Thornhill Road, Islington . 140 



West entrance of Trinity Church, Cloudesley Square, Islington . 136 



The ground in Middlesex covered by London has generally a down- 

 ward slope from north-west to south-east, but it is nuicli undulated, 

 though the levels have been a good deal altered in making streets and 

 buildings. 



6. Geology. — Only a very brief summary of the geological features 

 of the county can be given here. For fuller information Mr. 

 "VVhitaker's Memoir, describing sheet 7 of the Geolo;:ical Survey, 

 and the papers quoted by him, should be referred to. The following 

 account has been mainly drawn up from these sources : — 



491 

 425 

 065 

 014 

 880 

 518 

 048 

 528 

 810 

 581 

 611 

 154 

 083 

 959 

 202 



