Can anyone tell me the tone of this poem?

Question

THE INVADING SPRING - Phoebe Hesketh

Man has fenced the wilderness back in the hills;
Tamed in the town he walks on concrete blocks;
And in the park his heart with pleasure fills -
But not at Wordsworth’s school-book daffodils.
No, his delight is catching up with clocks
And turning knobs and pressing button A -
The train is due; there’s half a minute to go
But the lift’s gone down and the escalator’s slow -
Praise God for the Underground this lark-song day!

Breathing, yet dead, his life is caged with steel -
Wire, wheel, and cable - automatic aids
To living - he exists but cannot feel
The slow barbaric beauty that invades
A world at Spring. He moves in crowds and queues
And reads the Morning Star and the Evening News
But cannot read the sky though April beats
A golden fanfare down the dusty streets
And breathes a green breath through the petrol fumes.

Yet a third-floor room is powerless to deny
The feel of leaves, the pollen-smell behind
New flowered cretonnes where a rebel wind
Is strong and blue with ranging through the sky.
And though the files of his mind are entered up
Like office ledgers, unknowing he holds the cup
Brimmed with the light of moons beyond his reach.
The street is thronged with more than he can know -
The Invisibles who know him; without speech
They call him; without form they come and go
And catch him by the sleeve until the slow
Unwilling flesh is beckoned from its task.
Released, he finds the vital stream that spills
A primrose light on sullen window-sills.

Answer 1

Here's a list of words that may describe the tone of a literary piece

angry, sad, sentimental, sharp, cold, fanciful, upset, urgent, complimentary, silly, joking, condescending, boring, poignant, sympathetic, afraid, detached, contemptuous, happy, confused, apologetic, hollow, childish, humorous, joyful, peaceful, horrific, allusive, mocking, sarcastic, sweet, objective, nostalgid, vexed, vibrant, zealous, tired, frivolous, irreverent, bitter, audacious, benevolent, dreamy, shocking, seductive, restrained, somber, candid, proud, giddy, pitiful, dramatic, provocative, didactic

I'm sorry I don't know the source of this list. It was given me by a student in a Raleigh high school English class.

Answer 2

And remember that "mood" in a literary piece goes beyond simply feeling or atmosphere or ambiance.
http://www.tnellen.com/cybereng/lit_terms/mood.html
It's "the emotional attitude the author takes towards hir subject."

Answer 3

The tone? Exultant, I guess, and perhaps smug, because the author knows something everyone else is missing. It’s a kind of exhortation - but from a distance, as if the world is going on within her and without her.