Finally, the effect of a single evil precedent upon the future of the Park must be kept constantly in mind. The door once opened, though by never so small a degree, can not again be closed; but will sooner or later be thrown wide open. A privilege granted to one can not be denied to another. If one corner of the Park is cut off, other portions will share the same fate. If one railroad is granted a right of way across the reservation, another can not be refused. The only way to avoid these dangers is to keep the door entirely closed. There is now but little real need of further positive legislation. Some provision should of course be made for an adequate police force, and ample means should be provided to perfect the system of roads. Happily this duty involves no appreciable burden. It requires no continuing outlay to "beautify and adorn." And when it is done, the further policy of the government toward the Park should be strictly negative, designed solely to preserve it unimpaired, as its founders intended, for the "benefit and enjoyment" of succeeding generations. APPENDIX A. GEOGRAPHICAL NAMES IN THE YELLOWSTONE NATIONAL PARK. I. INTRODUCTORY. In common experience, the importance of geographical names lies in their use as a means of identification. To describe an object there must be a name, and for this purpose one name is as good as another. But if the reason be sought why a particular name happened to be selected, it will generally be found to arise, not from this practical necessity, but from some primary fact or tradition, or from some distinguished character, in the annals of the community where it occurs. In its mountains and valleys, its lakes and streams, and in its civil divisions, the cradle history of a country may always be found recorded. In newly-discovered countries, the naming of geographical features is the dearest prerogative of the explorer, as it is also the one most liable to abuse from personal vanity or egotism. The desire to attach his name, or those of his personal friends, to the prominent landmarks of the globe, where the eye of posterity may never escape them, is a weakness from which no discoverer has yet shown himself free.