Could anyone provide the words to this very famous song? 
I remember it was very popular at my school just after the war.

Dear kemlo,

Here are the lyrics you were looking for:

The Boers Have Got My Daddy 
Written and composed by Mills and Castling  

This morning in a busy street,  
A tiny lad I spied,  
With paper hat, and little wooden  
Sword slung by his side;  
Said I, 'Good morning, Gen'ral!'  
In a playful sort of way,  
'I see by your appearance you're  
Preparing for the fray.'  
He stood up to attention,  
Looked at me with flashing eye,  
Then gripped his little wooden sword  
As he made this reply -  

(Chorus:)

'The Boers have got my Daddy  
My soldier Dad;  
I don't like to hear my Mammy sigh,  
I don't like to see my Mammy cry;  
So I'm going in a big ship  
Across the raging main,  
And I'm going to fight the Boers, I am,  
And bring my Daddy home again!' 

I smiled down at the youngster, though  
A lump came in my throat,  
And marvell'd at the pluck beneath  
That little ragged coat.  
To hear the way that kiddy talked  
It really was sublime,  
But there you are! The old, old tale  
A Briton all the time!  
Said he, 'I've wrote to Gen'ral Bobs,  
To join his gallant band  
I'll pay the naughty Boers for keeping Daddy when I land!' 

(Chorus) 

I learnt his father was a private  
In an Irish corps,  
But when I heard the name I knew  
He'd never see him more;  
For in the list of casualties  
I'd only read that day,  
Beneath the scorching veldt that youngster's  
Gallant father lay.  
The nipper left me standing there,  
And marched away with pride,  
But turned his little curly head  
Again to me and cried - 

(Chorus)


Source:

New Zealand History: South African War - Songs
http://www.nzhistory.net.nz/Gallery/SAW/songs.htm

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"Boers Have Got My Daddy" lyrics
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Best regards,
Scriptor