So far there isn't a clew to follow.

But you may rest assured that what any man can do, Burke will do." "I'm so grateful, sir!" said Tom.
"Then you must show it by being a man, and not by giving way to your trouble in this foolish manner." "I'll try, sir, now that there's something to hope for." "There's a good deal to hope for.

Despair won't help you.

You must go to work." "I will.

It won't be very easy to get work, for I've disgraced myself in this neighborhood, and I can't leave here till something is known of Lucy's fate.