We live in a fast age, and New Yorkers are a fast people; hence, it seemed intolerable to some that the law regulating driving at the Park should restrict every man to six miles an hour, and arrest summarily every blood who dared to disregard the rule. Nor was the private trotting course between the Park and High Bridge adequate to the demand. A great public drive, broad and long, where hundreds of fleet horses could be exercised in a single hour, was the demand that came welling up from the hearts of thousands. One was accordingly laid out on the line of the old Bloomingdale Road, beginning at Fifty-ninth street with an immense circle for turning vehicles. On the 21st of September, 1868, the work of grading commenced; and during 1869 an average force of 740 men was employed. This street extends from Fifty-ninth to One Hundred and Fifty-fifth street, a distance of about five miles, is one hundred and fifty feet wide, with a narrow line of shrubbery and flowers extending through the centre, defended by solid curbstones. In the construction of this street it was found necessary to remove, by excavation and blasting, 350,000 cubic yards of rock and earth, and to provide and deposit 300,000 cubic yards in certain depressed localities, to perfect the grade. The bed of the street is formed of set stone, covered with pounded stone, after which it is graveled, rolled, and the surface otherwise improved. The sidewalks are very capacious. This street is expected to be one of the later wonders of Manhattan, and land is held at fabulous prices along its entire length.