This poem from Clark Ashton Smith (CAS) was unpublished is his lifetime, and is not available on The Eldritch Dark, so here's the complete text:
In this fantasmal autumn vale
Although no specific mention is included in these lines, the references to dry climatic conditions and the description of "my latest love" seem to suggest that this poem might have been directly inspired by real events from CAS' life in and around Auburn, California.
The hot-summer Mediterranean climate of Placer County and the surrounding region could well inspire thoughts of Tantalus, sentenced to an eternal punishment with food and water forever close at hand, but always just out of reach.
I love the way that CAS combines elements of the mythological and the supernatural into an earthly encounter with a lady love. That weaving together of magical and mundane elements is a technique he used in other poems, and one that he always handled with a sly skill.