Unfortunately, it was during this period that great mistakes were made--such as giving over part of the Mall to garden purposes and in letting Government areas, so much desired now, go for private purposes; also in the location of certain public buildings, as erecting the Treasury Department in the center of Pennsylvania Avenue. CHAPTER IX WASHINGTON, 1840-1859 In 1840 Washington had a population of 23,364. The city was still in a very much undeveloped state, though the fact that it was the National Capital was not lost sight of. In 1846 the construction of the Smithsonian Institution Building was begun, and on July 4, 1848, the corner stone of the Washington Monument was laid. On July 4, 1851, the corner stone for the enlargement of the Capitol according to plans as we see it to-day, was laid. [Illustration: THE CAPITOL, 1840] However, so far as city development was concerned, little was done during this period. The L’Enfant plan seemed either forgotten or entirely too large for the National Capital. In the city of Washington not a street was lighted up to 1860 excepting Pennsylvania Avenue. Pigs roamed the principal thoroughfares. Pavements, save for a few patches here and there, were altogether lacking. An open sewer carried off common refuse, and the police and fire departments might have sufficed for a small village rather than for a nation’s capital. [Illustration: WASHINGTON, 1852] In 1846 the part of the District of Columbia on the west bank of the Potomac, including Alexandria, was re-ceded to Virginia. This was done pursuant to an act of Congress of July 9 of that year, and with the assent of the people of the county and town of Alexandria, at an election on the first and second days of September, 1846, by a vote of 763 for retrocession and 222 against it. On September 7, 1846, President Polk issued a proclamation giving notice that the portion derived from the State of Virginia, about 36 square miles, was re-ceded to that State. The action of Congress and the President was based upon petitions of the people of the town and county of Alexandria. The chief reasons were two: First, that the United States did not need Alexandria County for the purpose of the seat of government; the public buildings were all erected on the north side of the river, as required by law--none on the south side--and it was declared that so far as it could be foreseen the United States would never need that part of the District of Columbia for the purpose of the seat of government. Secondly, the petitioners said that the people of Alexandria had failed to derive or share in the benefits which had been enjoyed by the residents of the Maryland portion of the District of Columbia in the disbursements for public improvements, etc., while on the other hand they were deprived of those political rights incident to citizenship in a State.