° ′ Lat. Congress House, 38.53.N. Long. _0′. 0′._ References. F. Grand Cascade, formed of the Water from the sources of the Tiber. G. Public walk, being a square of 1,200 feet, through which carriages may ascend to the upper Square of the Federal house. H. Grand Avenue, 400 feet in breadth, and about a mile in length, bordered with gardens, ending in a slope from the houses on each side. This avenue leads to the Monument A, and connects the Congress Garden with the I. President’s park, and the K. Well improved field, being a part of the walk from the President’s house, of about 1,800 feet in breadth, and ³⁄₄ of a mile in length. Every lot, deep coloured red, with green plots, designates some of the situations which command the most agreeable prospects, and which are the best calculated for spacious houses and gardens, such as may accommodate foreign Ministers, etc. L. Around this Square, and all along the M. Avenue from the two bridges to the Federal house, the pavement on each side will pass under an Arched way, under whose cover Shops will be most conveniently and agreeably situated. This street is 160 feet in breadth, and a mile long. Page 31: ° ′ Lat. Capitol 38:53, N Long 0: 0. OBSERVATIONS explanatory of the Plan. I. The positions for the different Edifices and for the several Squares or Areas of different shapes, as they are laid down, were first determined on the most advantageous ground, commanding the most extensive prospects, and the better susceptible of such improvements, as either use or ornament may hereafter call for. II. Lines or Avenues of direct communication have been devised to connect the separate and most distant objects with the principal, and to preserve through the whole a reciprocity of sight at the same time. Attention has been paid to the passing of those leading Avenues over the most favorable ground for prospect and convenience. III. North and South lines intersected by others running due East and West, make the distribution of the City into Streets, Squares, &c.; and those lines have been so combined as to meet at certain given points with those divergent Avenues, so as to form on the Spaces “first determined,” the different Squares or Areas. Perpendicular height of the source of } F. I. Pts. Tiber Creek above the level of the } 236.7.⁵⁄₈ tide in said Creek } This branch and that of the Tiber may be conveyed to the President’s house. The water of this Creek may be conveyed on the high ground where the Capitol stands, and after watering that part of the City, may be destined to other useful purposes. The perpendicular height of the ground where the Capitol is to stand, is above the tide of Tiber Creek 78 Feet.