No it shouldn't be 'tenner'. In the days when this song was written sixpence - a 'tanner' - would have been enough to buy a pint of old and mild. I used to have this song on a 78 when I was a boy, along with 'The biggest aspidistra in the world', various others and a wind-up gramophone. It was performed in a semi-spoken form and strong Lancashire accent. The missing verses are as follows:
After 'When the villain seized the maiden.....'

He told her that he'd wed her, ha-ha-ha, then enticed her on his yacht,
And then he got her tied up in a proper sailor's knot.
Then he kissed her twice, the dirty dog, upon her beauty-spot,
Oh-oh-oh I've never cried so much in all me life.

(The 'oh's, apart from the last two verses, are long, drawn-out warbly affairs.) Then after the last verse quoted above:

The villain called on her one night, she was his one desire - ha-ha-yeah
And because she wouldn't stand for him what do you think he did, eh, What do you think he did? Ha! Set the house on fire!
She rushed towards the window with her face all pale and sad,
But the villain only laughed - ha-ha! - then walked away, the cad!

Oh, she looked so very pitiful upon the window-sill,
Oh!(shrieked) I've never cried so much in all me life.
"Jump! Jump!" the people shouted, but she sat there calm and still.
Oh!(shrieked) I've never cried so much in all me life.

The flames burnt her kimona(sic) but she didn't seem to mind.
Then she slid down a ladder, oh she did look so refined.
Till upon a rusty nail she left her underclothes behind.
Oh(shrieked) I've never cried so much in all me life.

They don't write songs like that any more.