Note 30 — Chapter XVI

"Dr. Clarke ('Remarks,' &c.) gives 100,000 ounces. This was the calculation of Mr. Swanzy before a Parliamentary committee in 1816. Of course it is impossible to arrive at any clear estimate. Allowing the African Steam Ship Company a maximum of 4000 ounces per month, we obtain from that source 48,000 ounces. But considerable quantities are exported in merchant ships, more especially for the American market. Whilst, therefore, some reduce the total to 60,000 ounces, others raise it to half a million of money."