I shall try and give it to you in his own very words.
"'I have only one thing,' he said, 'which weighs upon my mind at this supreme moment.

It is my treatment of poor Morstan's orphan.

The cursed greed which has been my besetting sin through life has withheld from her the treasure, half at least of which should have been hers.
And yet I have made no use of it myself,--so blind and foolish a thing is avarice.

The mere feeling of possession has been so dear to me that I could not bear to share it with another.

See that chaplet dipped with pearls beside the quinine-bottle.