Ll. 39-40 of Wordsworth’s ode “The Pass of Kirkstone.” The complete poem appears at
the end of the Guide.

Latin: “He who distinguishes well, teaches well.” This anonymous adage was widely
repeated, especially in legal and philosophical contexts, in Wordsworth’s age.

Sheep in the Lake District tend to give birth (or “yean”) between mid-April and mid-May.

The 1810 edition is more definitive, claiming that nightingales are never found as
far north as the Lake District. As De Selincourt points out, if Wordsworth revised
this passage because he believed he had observed a nightingale in Cumbria between
1810 and 1820, he must have been mistaken, as all ornithological studies suggest the
bird never journeys this far north.

Thomas West.

This widely quoted passage is one of the earliest articulations of what would become
the founding ideals of the national parks movements in Britain, the United States,
and elsewhere.

The concluding sestet of “Degenerate Douglas,” a sonnet Wordsworth wrote in 1803 in
outrage over the wholesale clearing of Scottish woodlands by William Douglas, 3rd
Earl of March and 4th Duke of Queensberry.

The species Wordsworth has in mind is prunus padus, most widely known today as the hackberry tree.