This is Charles Kemp Dove, a great-great-great-great-great-grand uncle of Krysta and Teresa, discussing the falling price of Opium that was mostly being sold to China.
It turns out that Charles, his father and several of his brother-in-laws worked at various times for the Board of Customs, Opium and Salt.
The Asiatic Journal and Monthly Miscellany, Volume 32 page 191
Mr. Charles Kemp Dove, Deputy Registrar of the Opium Board, proved the price given for the opium in question at the sales of January 1839. In cross-examination, witness said that, in May and June following, the prices had fallen to about Rs. 200, from the 860 to 865, which had been commanded in the January sales.