Here's some annotations for language:
Webby fold on fold - metaphor, spider web imagery, feeling of entrapment + anxiety
Life a waning taper - simile, the candle of hope is going out
She sits - passive verb, she is helpless to do anything. Present tense, makes it tense as we don't know what will happen next
He - has fallen - euphemism, could be the messenger being polite, or that her reaction is dulled
Fresh firm - Irony, the man is no longer fresh and firm. Alliteration, makes it feel more frivolous
Page-full of his hoped return - The man was excited about returning
Annotations for structure and form:
Change in pace in second stanza - Warm language juxtaposes against how much the wife has lost
Awkward phrasing - 'Of meaning it dazes to understand', shows the shock of the wife
Rhyme pattern - ABBAB, (like a sing song), which contrasts the happy relationship to his death
Other things you could look at: Tawny vapour, street lamp glimmers cold, The Irony, Firelight flicker, In the far South land...
Hope this helps!