| Show Gren text the most extensive fortification in ane world as every one knows is the chinese wall according to recent surveys this wall is 1728 miles in length reaching from the gull gulf of Pec helee to the confines of turkestan Turk estan this remarkable structure passes up steep sleep mountains down clown into gorges and ravines lakes crosses rivers valleys and plains seemingly regardless of obstacles it Is 25 feet thick at the bottom and IS 15 at the top arid and from 25 to 30 feet in height with lanking turrets or OA A or er 35 to 40 feet hilgh every or j aids during its entire length the exterior walls are of well cut granite blocks the interior is fi led with earth and stone and cic passageway is paved wite wile bricks one foot square its erection was begun in B C and it was designed to protect the northern frontier of china against the savage tribes of siberia |
