He walked along untrodden paths (as she had dwelt among untrodden ways) Where Frost lay lightly on the ground Having slipped upon a mossy stone That by a violet was concealed. And that can happen when you take untrodden paths!
This minor confection suggested itself by a chance recognition of the similarity between Robert Frost’s road less travelled and William Wordsworth’s Lucy (who dwelt among the untrodden ways) as both end with “the difference that made the difference”.