Each, like a semicircle with stretched arms,
Joining the other round her preciousness—
Two walls that go about a garden-plot
Where a chance sliver, branchlet slipt from bole
Of some tongue-leaved eye-figured Eden tree,
Filched by two exiles and borne far away,
Patiently glorifies their solitude,—
Year by year mounting, grade by grade surmount
The builded brick-work, yet is compassed still,
Still hidden happily and shielded safe,—