Ok, from Arthur's point of view is in normal writing, Lancelot's is in italics. This whole thing only works if we believe that Arthur found Lancelot before he dies.

Open your eyes for the last time,

Part with the face of a friend

On your face too I see tears shine:

To death your life you lend.

You will go in without me

Next year will bring new spring

And earned my freedom will be

And no more in my ears will battle sing.

Lie still my friend, you are fading

No more can you cheat your fate

Beside you I'll stay waiting

Though help will come too late.

For me no help there will be

I have no desire to linger broken

Find you feet and stand on the proudly

I can hear your voice, though no words you spoken.

Now I will speak

But I fear I'm too late

The light in your eyes is growing weak

If this was my fate

Then so be it.

But to lose you my friend

Now at the biter end.

Don't weep for me

Can you not hear song rising

You are free

And I am dieing

Not overlong for me shall you grieve

Into sleepless dream I'm falling

And this sweet world I will leave

In my time here I am stalling

For me what this morn

And when the sun flees

I will be gone

And again glad will you be

You will go on with or without me.

Alas my friend before you time you've left

I'm here alone

Here in the darkness

O'er brook and stone

The sun is creeping

Your not gone, but peacefully sleeping

I will go on

Here in the dawn light

Your face battered and worn

Still rest your soul might

Walking away

I will not look back

Fleeing the pain

In it's unforgiving attack

Heavy on me rests this blame

Yet another friend I have lost I this life

And joy is something I will not feign

Into the darkness I fall

Deathless blackness overwhelms all

Rises a song out of the darkness

Not all is lost

Clear voices singing

Mourning the fallen, shrill bells ringing

Song of sadness