But in addition to these there are, no doubt, many more varieties, and though it may be a fact that, in certain districts, green tea is manufactured from a species differing from that from which black tea is manufactured, yet, in other districts, green and black teas are manufactured from one and the same plant.  The Chinese manufacturers now in Kumaon state that the plant is one and the same, and that it can be proved by converting black tea into green.  In manufacturing teas now in the manufactory, if a large quantity of leaves are brought in from the plantations, one half are converted into green, and one half into black tea.  This only shows that much of the green and black teas of commerce are manufactured from one and the same plant.  The Assam plant is, from the characters given, quite a distinct plant, and agrees, as already stated, most nearly with the species described as Thea viridis.  It would, therefore, be most desirable to procure seeds of this so-called species, and also of other varieties, of which, no doubt, there is a great variety.  From the northern districts of China in particular, seeds ought to be imported, not, however, in large quantities, but in quantities of two or three seers, so that they might, on arrival at Calcutta, be sent up the country as quickly as possible, for, if the seeds are kept long out of the ground, not one will germinate; such was the fate of all the seeds contained in ten boxes imported by government in 1845, not one having germinated, which was much to be regretted.  Had they been sent in small parcels, well packed in wax cloth, to prevent them from being injured by moisture, and placed in an airy part of the vessel in transmission from China to Calcutta, and, on arrival there, sent by dawk banghay direct to the plantation, they would, I am confident, have reached in good condition.  It is well worthy of a trial and seeds ought, if possible, to be obtained from every district celebrated for its teas.  It is in this manner, by obtaining seeds of the finest varieties of plants, that the finest teas will be procured.  I do not mean to infer that the tea plants now under cultivation are not the produce of fine varieties, for that has been proved by the undoubted testimony of the London brokers, but only that there are, no doubt, many others well worthy of introduction.  In confirmation of what I have stated, I may quote the words of my late friend Dr. Griffith, who, in his report on the tea plant of Assam, says—­“I now come to the consideration of the steps which, in my opinion, must be followed if any degree of success in the cultivation of tea is to be expected; of these the most important is the importation of Chinese seeds of unexceptionable quality, and of small numbers of their sorts."[11] Dr. Royle, too, who was the first person to point out that the Himalayas were well adapted to tea cultivation, and to whom the credit of recommending to government the introduction