From upset only, but contrived himself
A snug interior, warm and soft and sleek.
Of what material? Oh, for that, you seek
How nature prompts each volatile! Thus—pelf
Smoothens the human mudlark's lodging, power
Demands some hardier wrappage to embrace
Robuster heart-beats: rock, not tree nor tower,
Contents the building eagle: rook shoves close
To brother rook on branch, while crow morose
Apart keeps balance perched on topmost bough.