And 'tis only that I've recollected since I saw you, a circumstance of which possibly you may make some use.' 'I'm deeply obliged, Sir--deeply,' said Mervyn, eagerly.
'I'm only, Sir, too happy.

It relates to Charles Archer.

I've recollected, since I saw you, a document concerning his death.

It had a legal bearing of some sort, and was signed by at least three gentlemen.
One was Sir Philip Drayton, of Drayton Hall, who was with him at Florence in his last illness.

I may have signed it myself, but I don't recollect.