From Bombay the imports are white sugar, rice, cutlery, furniture, rugs, silks, and every kind of cotton and woollen goods worn by rich Arabs and Hindoos. From France, crockery and china ware, watches, clocks, iron for negro ornaments in the Nemwei, (African interior,) sherbut, cutlery, umbrellas, black cloth, silks, and a variety of French trifles.

From the United States, cotton, guns, powder, and sugars, are imported. From Mozambique, corn; from Madagascar, rice; from Comoro, a few slaves. From the east coast of Africa, ivory, copal, hides, horn, ostrich feathers, staves, and couries.

EXPORTS.

To the east coast of Africa, powder, guns, iron, brass wire, cotton cloths, corn and rice, are exported.

To the west coast, couries.

To Bombay, specie, cloves, copal, ivory, cocoanuts, tiling.
To Muscat, cloves, slaves, American cotton, and specie.

To Calcutta, cocoanuts and tiling.

AMERICAN TRADE.

During the quarter ended June 30, 1862, no American vessel visited this port. At present our trade is almost entirely suspended.

Tabular statement showing the number of American vessels that have visited the port of Zanzibar from 1857 to 1862, inclusive.

Comparative tabular statement showing the description and number of cargoes of American manufactures brought to Zanzibar in American bottoms for the several periods of 1837-'45, 1846-'56, 1857-'62, inclusive.

·Comparative statement showing the description and quantities of American manufactures imported into Zanzibar from 1857 to 1862, inclusive.

Tabular statement showing our exports from the port of Zanzibar for the five years ended June 30, 1862, together with the next quarter, ended September 30, 1862.

Tabular recapitulation of the grand totals, averages, &c., of American trade at the port of Zanzibar from 1837 to September 30, 1862.

Tabular statement showing the annual total and average value, in dollars, of imports into and exports from the port of Zanzibar in American vessels from January 1, 1857, to September 30, 1862.

From which it appears that the four years 1857, '58, '59, '60, may be regarded as the best years of the trade since 1854. From the year 1860 this trade has steadily declined, for which there is but one real cause-our civil war. Excluding the two bad years, 1861, '62, we have the annual average imports.

SALEM, May 4, 1863.

I take the earliest opportunity to acknowledge the receipt of your letter of the 3d instant.

I was a resident at or near Zanzibar, and in frequent business intercourse with it, for a space of 20 years. I enjoyed, during the four years that I was consul, a favored and frequent personal intercourse with Seyd Maseed bin Seyd bin Sultan, the present Imaum of Zanzibar, who always seemed disposed to look favorably upon the Americans in their commercial intercourse with his subjects.

and

Our trade was conducted upon terms as favorable as that of any other nation; upon reflection, I do not think it possible that any material increase of trade

could be created with Zanzibar from any new treaty or convention. My opinion is formed from a long and familiar acquaintance, not only with the habits, but the character also, of both the rulers and natives of those countries. I have not now, and probably never shall again have, any personal interest in the Zanzibar trade, but have known that the trade has been much decreased during the rebellion here, and must have been so during the few weeks' residence of Mr. Speer in Zanzibar. Before the present war there have been 12,000 bales of manufactured cotton goods exported to Zanzibar per annum; I think since the war not more than 1,000 bales in all have been sent. From the sale of these cottons, funds are made with which to procure return cargoes, unlike other places or ports in India, there being no sale for bills of exchange on England.

Ď. W. MANSFIELD.

PROVIDENCE, May 4, 1863.

Herein I beg to acknowledge the receipt this day of your letter of the 2d instant, containing the inquiry, "If within my knowledge there were any such restrictions upon our trade at Zanzibar, as to require or make expedient any further negotiations."

I beg leave to say in answer, none whatever. The treaty existing was made with the late imaum, who died while I resided at Zanzibar, in 1857. Its stipulations I regard as exceedingly favorable to American trade; the duty on imports being 5 per cent. on their market value, payable in cash or in kind, at the option of the seller. Every facility is allowed to all agents of the foreign houses resident there, as well as to strangers or new-comers, and I may truly say, almost every indulgence also. Complaints against offenders or debtors are instantly attended to by the king Seyd Mayid in person, and all wrongs are fully redressed. I have never been in any country or city where the person or property of foreigners was so secure or safe as in Zanzibar. I resided there two years, and during that time my transactions in trade exceeded $400,000.

R. GREENE.

(The present peculiar importance of the subject recommends the insertion of the following letters in this report with the view of extensive publicity.)

SIR: The medical profession has recently hailed the discovery of the longdesired and vainly-sought-for means of contracting the pupil of the eye so as to enable the physician to reach the seat of certain lamentable and heretofore incurable diseases of the organ of sight.

In Calabar, on the coast of the Gulf of Guinea, is growing a bean, which bears the sole name of "bean of Calabar." This plant is known at present to be possessed exclusively of the quality of causing the contraction of the pupil of the eye. Some eminent physicians in London have lately obtained the happiest results in using it for that purpose. Apprized of this fact, I communicated immediately with my correspondent, (my calling in New York being both that of chemist and apothecary,) and was answered, that the small quantity of the said bean was seized upon by the physicians; the bean having been obtained only through the help of missionaries in that part of Africa, as the native chiefs of Calabar are opposed to its exportation, it being used in Divine judgment among the African people. The priests and chiefs cultivate the plant in well