Read "Winter Moonlight" at The Eldritch Dark:
Although this poem from Clark Ashton Smith (CAS) is hardly among his best, his technical command of poetic language is still on display, as in these lines:
Departed loath and laggardly
Into the icy, luminous, immense white night.
Both lines demonstrate the use of alliteration, and the second of those lines combines alliteration with internal rhyme ("white night").
That second line especially has a strong rhythmic pulse, and the use of the internal rhyme immediately before a period gives the reading a natural pause. Even in a poem that does not represent CAS at his very best, there is much to admire about his command of the English language in verse.