Need some help on annotating a poem

The Affliction of Margaret
Where art thou, my beloved Son,
Where art thou, worse to me than dead!
O find me, prosperous or undone!
Or if the grave be now thy bed,
Why am I ignorant of the same
That I may rest; and neither blame
Nor sorrow may attend thy name?

Seven years, alas! to have received
No tidings of an only child;
To have despair’d, have hoped, believed,
And been for evermore beguiled;
Sometimes with thoughts of very bliss!
I catch at them, and then I miss;
Was ever darkness like to this?

He was among the prime in worth,
An object beauteous to behold;
Well born, well bred; I sent him forth
Ingenuous, innocent, and bold:
If things ensued that wanted grace
As hath been said, they were not base;
And never blush was on my face.

Ah! little doth the young-one dream
When full of play and childish cares,
What power is in his wildest scream
Heard by his mother unawares!
He knows it not, he cannot guess;
Years to a mother bring distress,
But do not make her love the less.

Neglect me! no, I suffer’d long
From that ill thought; and being blind
Said ‘Pride shall help me in my wrong:
Kind mother have I been, as kind
As ever breathed:’ and that is true;
I’ve wet my path with tears like dew,
Weeping for him when no one knew.

My Son, if thou be humbled, poor,
Hopeless of honour and of gain,
O! do not dread thy mother’s door;
Think not of me with grief and pain:
I now can see with better eyes;
And worldly grandeur I despise
And fortune with her gifts and lies.

Alas! the fowls of heaven have wings,
And blasts of heaven will aid their flight;
They mount—how short a voyage brings
The wanderers back to their delight!
Chains tie us down by land and sea;
And wishes, vain as mine, may be
All that is left to comfort thee.

Perhaps some dungeon hears thee groan
Maim’d, mangled by inhuman men;
Or thou upon a desert thrown
Inheritest the lion’s den;
Or hast been summon’d to the deep
Thou, thou, and all thy mates, to keep
An incommunicable sleep.

I look for ghosts; but none will force
Their way to me: ’tis falsely said
That there was ever intercourse
Between the living and the dead;
For surely then I should have sight
Of him I wait for day and night
With love and longings infinite.

My apprehensions come in crowds;
I dread the rustling of the grass;
The very shadows of the clouds
Have power to shake me as they pass;
I question things, and do not find
One that will answer to my mind;
And all the world appears unkind.

Beyond participation lie
My troubles, and beyond relief:
If any chance to heave a sigh
They pity me, and not my grief.
Then come to me, my Son, or send
Some tidings that my woes may end!
I have no other earthly friend.

(1807) --William Wordsworth

I need some help annotating this poem, can someone help me interpret some of the archaic words... thanks
Also, i have to teach my class about this poem (pretend to be the teacher for 30 min) what do you think is the best way to teach it? for at least 30 min ;)