In leaves no step had trodden black. Oh, I kept the first for another day! I doubted if I should ever come back. And that has made all the difference. From The Poetry of Robert Frost by Robert Frost, edited by Edward Connery Lathem. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.