Near this spot
are deposited the Remains of one
who possessed Beauty without Vanity,
Strength without Insolence,
Courage without Ferocity,
and all the Virtues of Man without his Vices.
This Praise, which would be unmeaning Flattery
if inscribed over human Ashes,
is but a just tribute to the Memory of
BOATSWAIN, a DOG

George Gordon, Lord Byron (1788-1824) English poet
“Epitaph to a Dog” (1808)
    (Source)

Carved on the headstone over Boatswain's grave at Newstead Abbey, the family's ancestral home. Byron acquired the dog at age fifteen; Boatswain died of rabies, an endemic disease in England at the time, five years later. Byron wanted to be buried beside him, but the sale of the property made that impossible.

While the rest of the poem is considered Byron's, these first lines may have been written by his friend, John Cam Hobhouse. More discussion here.