Who was the Society Burglar?

Hint 1 of 8:

I suggest looking at The Times for information on the crimes.

Hint 2 of 8:

Try the 4 July 1888 issue, page 2, column 2, article 4.

Hint 3 of 8:

Look at both the dates and the dollar amounts closely.

Hint 4 of 8:

I bet the thief had to sell all those jewels.

Hint 5 of 8:

Calvin Leach took stolen goods for *exactly* half their worth.