Where mountains rise, umbrageous dales descend,

And caverns deep, as optic tube descries,

A smaller Earth, gives all his blaze again,

Void of its flame, and sheds a softer day.

Thomson could not resist the attractions of Milton's stately Latin vocabulary. Where Milton describes how, in Paradise--

the flowery lap

Of some irriguous valley spread her store;

Thomson follows with--

See where the winding vale its lavish stores

Irriguous spreads.