avenues" later named after the states of the union crossed the grid. Where these "grand avenues" crossed each other, L'Enfant placed open spaces in circles and plazas that were later named after notable Americans. L'Enfant's broadest "grand avenue" was a garden-lined esplanade, which he expected to travel for about along an east–west axis in the center of an area that the National Mall now occupies. A narrower avenue (Pennsylvania Avenue) connected the "Congress house" (the Capitol) with the "President's house" (the White House). In time, Pennsylvania Avenue developed into the capital city's present "grand avenue". L'Enfant's plan included a system of canals, one of which would travel near the western side of the Capitol at the base of Jenkins Hill. To be filled by the waters of Tiber Creek (also named "Goose Creek") and James Creek, the canal system would traverse the center of the city and would enter both the Potomac River and the Eastern Branch (see: Washington City Canal). On June 22, L'Enfant presented his first plan for the federal city to the President. On August 19, he appended a new map to a letter that he sent to the President. President Washington retained one of L'Enfant's plans, showed it to Congress, and later gave it to the three Commissioners. The survey map may be one that L'Enfant appended to his August 19 letter to the President. L'Enfant subsequently entered into a number of conflicts with the three commissioners and others involved in the enterprise. During a contentious period in February 1792, Andrew Ellicott, who had been conducting the original boundary survey of the future District of Columbia (see: Boundary Markers of the Original District of Columbia) and the survey of the federal city under the direction of the Commissioners, informed the Commissioners that L'Enfant had not been able to have the city plan engraved and had refused to provide him with the original plan (of which L'Enfant had prepared several versions). Ellicott, with the aid of his brother, Benjamin Ellicott, then revised the plan, despite L'Enfant's protests. Ellicott's revisions, which included the straightening of the longer avenues and the removal of Square No. 15 from L'Enfant's original plan, created minor changes to the city's layout. Ellicott stated in his letters that, although he was refused the original plan, he was familiar with L'Enfant's system and had many notes of the surveys that he had made himself. It