[360] Wm. Still, _Underground Railroad_, p. 41. "The Underground Railroad brought away large numbers of passengers from Richmond, Petersburg, and Norfolk, and not a few of them lived comparatively within a hair's breadth of the auction block." Wm. Still, _Underground Railroad Records_, p. 141. [361] Conversation with Mrs. Elizabeth Cooley, a fugitive from Norfolk, Va., Boston, Mass., April 8, 1897. [362] Letter of Frederick Douglass, Anacostia, D.C., March 27, 1893. [363] Conversation with Mrs. Tubman, Boston, Mass., April 8, 1897. It is apparent from the map that the numerous tributaries of the Ohio and the great valleys of the Appalachian range afforded many tempting paths of escape. These natural routes from slavery have been recognized and defined by a recent writer.[364] "One," he says, "was that of the coast south of the Potomac, whose almost continuous line of swamps from the vicinity of Norfolk, Va., to the northern border of Florida afforded a refuge for many who could not escape and became 'marooned' in their depths, while giving facility to the more enduring to work their way out to the north star land. The great Appalachian range and its abutting mountains were long a rugged, lonely, but comparatively safe route to freedom. It was used, too, for many years. Doubtless a knowledge of that fact, for John Brown was always an active railroad man, had very much to do, strategically considered, with the Captain's decision to begin operations therein. Harriet Tubman ... was a constant user of the Appalachian route in her efforts to aid escaping slaves.[365] ... Underground Railroad operations culminating chiefly at Cleveland, Sandusky, and Detroit, led by broad and defined routes through Ohio to the border of Kentucky. Through that State, into the heart of the Cumberland Mountains, northern Georgia, east Tennessee, and northern Alabama, the limestone caves of the region served a useful purpose.... The Ohio-Kentucky routes probably served more fugitives than others in the North. The valley of the Mississippi was the most westerly channel, until Kansas opened a bolder way of escape from the southwest slave section." These were the main channels of flight from the slave states; but it must be remembered that escapes were continually taking place along the entire frontier between the two sections of the Union, the drift of travel being constantly towards those points where the homes of abolitionists or where negro settlements indicated initial stations on lines running north to freedom. The border counties of the slave states were thus subject to a steady loss of their dissatisfied bondmen. This condition is well represented in the case of several counties of Maryland, concerning which Mr. Smedley obtained information. He says, "The counties of Frederick, Carroll, Washington, Hartford and Baltimore, Md., emptied their fugitives into York and Adams counties across the line in Pennsylvania.