TOPOGKAL'HY OF THE DISTRICT. 25 



At this point also is au old-fashioned " rope-walk " where as boys, 

 twenty years ago, we obtained the raw flax which we used in mounting 

 specimens. 



This brings us to the first section of Professor Ward's division of the 

 Bock Creek region, which extends from the P street bridge to Woodley 

 Park. 



The creek here makes a long curve. Following the strea-n against the 

 current, we first go almost directly west, turning at the dam of Lyon's 

 Mill to the north and northeast. On the north bank, just above the-P 

 street bridge, is "Kalorama," rendered historical in past years as the 

 residence of Commodore Decatur, and used during the War of the Be- 

 bcllion as the " Small Pox General Hospital." The surrounding hills 

 are wooded with old forest trees. On the south bank, covering a steep, 

 rocky ascent, is the beautiful and picturesque Oak Hill Cemetery. On 

 the bank of the creek is Lyon's Mill, a short distance above which is the 

 dam. The woods upon both sides are favorite resorts of the Wood 

 Warblers, but collecting is forbidden. Along the shores of the creek 

 are found Sandpipers, Marsh Sparrows, and Maryland Yellow Throats, 

 while on the waters of the dam an occasional Duck or Dipper may be 

 seen in the early morning. 



Professor Ward's second division, the Woodley Park, extends from 

 above Lyon's mill-dam to "Adams' Mill," now used as a tannery, a. dis- 

 tance of about one mile. It presents extensive woods on both sides of 

 the creek which are excellent collecting grounds. Upon the west side 

 below the Woodley road bridge is a damp ravine in which one or two 

 Woodcock may usually be found in the proper season. 



Above the bridge, upon the west side, is perhaps the best collecting 

 ground during the early sjjring in the District for Yellow-breasted Chats, 

 Indigo Birds, Thrushes, Carolina Wrens, Worm eating Warblers, and, a 

 little later, of all the Wood Warblers. Here were taken in the spring 

 of 1882 the Golden-winged Warbler (Uclminthophila chrysoptera), Blue- 

 winged Yellow Warbler {H. pinm), and the Cape May Warbler (Den- 

 drceca tigrina). The scenery varies from high, open woods to low young 

 trees with dense undergrowth, rocky hillsides, and cool, shaded ravines. 



The third section extends from "Adams' Mill" to the confluence of 

 "Piney Branch" with Bock Creek, again a distance of about a mile, fol- 

 lowing the windings of the stream. 



At the lower portion on the east bank is a stone quarry, to which a 

 road leads down from the city. Above this quarry on the same side, 

 for a distance of half a mile, is another excellent collecting ground for 

 the spring migration. There are high, open woods, swampy hollows, 

 cool dells, thickets, and brier patches — all that make life attractive to 

 the retiring Wood Warblers. Here, in a little patch of pines, in May, 

 1882, in company with Mr. H. W. Henshaw, we collected some twenty 

 Blackburnian Warblers (Bendrceca blackburmv), besides scores of other 

 choice and rare specimens, ., 



