Green sods are all their monuments; and yet it tells A nobler history than pillared piles, Or the eternal pyramids.

The speaker contrasts humble, natural grave-markers—“green sods”—with grand, engineered memorials like colonnaded temples and the pyramids. The claim is that an unadorned resting place can “tell / A nobler history” than monumental architecture: moral worth, sacrifice, or lived virtue may be better honored by simplicity than by ostentation. The lines also imply a democratic or egalitarian reverence for the dead, suggesting that true remembrance resides in the meaning of lives and deeds rather than in expensive structures. Nature’s quiet covering becomes a more truthful record than stone meant to impress posterity.