The Park is a monument to the devotion of this Commission, in active operation for thirty years. Colonel Cope was succeeded (1931) by Colonel E. E. Davis, a native of Iowa, commissioned Major Quartermaster Reserve Corps, March 6th, 1917, who served overseas in the World War. Colonel Davis retired on July 16th, 1932. James R. McConaghie, native of Iowa, a graduate of Harvard College, 1st Lieutenant, 4th Infantry, 3rd Division in the World War, was appointed Superintendent February 8th, 1933. The development begun by the Association included laying out of avenues and erecting of regimental monuments, but nothing was done toward converting the avenues into permanent roads. The different lines of battle were not accurately marked, and important sections of land remained in private hands. By the end of the year the new Commission had made preliminary survey of 20 miles of avenues and proposed avenues, and, the following year, began construction. Gradually the whole field was made accessible by almost 35 miles of telford and macadam avenues. These avenues show the important positions occupied by the contending forces. Stone bridges were built across the streams. Miles of pipe-fencing and post-and-rail fencing were constructed, the former along the avenues indicating the battle-lines and the latter to enclose the Government land. Five steel observation towers were erected on prominent points, affording views in all directions. [Illustration: Jennie Wade House.—Here Jennie Wade was killed while baking bread. The house is practically unchanged: bullet-marks and other injuries have been preserved] An important task of the Commission was the accurate marking of the lines of battle of the opposing forces. Prominent commanders of both armies visited the field and assisted in locating the positions of the corps, divisions, and brigades. Suitable monuments and markers were then erected, with bronze tablets inscribed with an account of the operations of each corps, division, and brigade. Markers also show the locations of the headquarters of the Commander-in-Chief, as well as of the corps commanders of both armies. Six equestrian statues have been erected by States; also, imposing State monuments by New York, Pennsylvania, Virginia, North Carolina and Alabama. There are many smaller markers, placed by States and other organizations. Bronze statues of division and brigade commanders have been erected. There are a number of National Monuments; one in the National Cemetery, where Lincoln stood when making his immortal address at the dedication of the cemetery, November 19th, 1863; also one in the south end of the cemetery bearing a bust of Lincoln, and another on Hancock Avenue in memory of the troops of the Regular Army. All the positions held by the Regulars have been marked. The total number of monuments to date is 845. Four hundred and fifteen guns indicate the positions of the artillery brigades and battalions.