History repeats itself, not less in scientific Pine-apple growing than in any other branch of culture. Your correspondent from Elvaston Castle astonishes me by not mentioning the performances of the late Thomas Andrew Knight, Esq., as he may be said to have perfected the new system of growing Pine-apples without fermenting materials of any kind. If Mr M'Kellar turns to the Horticultural Transactions for 1829, or to the 'Gardeners' Magazine' of the same date, he will find Mr Knight's plan of growing the Pine-apple in detail. The late Mr Loudon did not believe that Mr Knight had succeeded in accomplishing what he had reported to the Royal Horticultural Society, as he stated that he had seen some one who told him that the plan did not answer Mr Knight's expectations.

I and some other gardeners went to Downton Castle to see the said Pine-apples, and wrote to Mr Loudon, after which he was obliged to acknowledge that Mr Knight's report of them was a correct one.

As for myself I never saw a house of Pine-apples more beautiful; the kinds were chiefly Black Jamaica and the Green Olive, two of the best-flavoured Pines then in cultivation.

It appeared strange to me that Mr M'Kellar did not mention the writings on the same subject of the then philosophic President of the Royal Horticultural Society.

I should have been more surprised in this case, had not a fashionable writer on agriculture called upon me the other day, when in the course of conversation I said, Come and I will show you the portrait of the greatest philosopher and the best farmer of his generation: this is Thomas Andrew Knight, Esq., of whom it was said in the ' Athenaeum' newspaper, that there was not a man left in all Europe who could fill the gap his death had made. The gentleman in question said, This is the first time that I have ever heard of him. Therefore I take it for granted that Mr M'Kellar has never heard of Mr Knight's Pine-growing; this being the case, it places Mr M'Kellar amongst the philosophers, as no gardener would blindly go to work on such a business who had not philosophised on the atmospheric conditions necessary for such an accomplishment.

One would have thought that the gardeners at Downton Castle, who have lived there since Air Knight's death, would have been proud to maintain that remarkable plan of cultivating the Pine-apple which Mr Knight left in full force, but I understand that they have not done so. The house is still in good order: a curvilinear roofed house, with glass down to the curbstone, so that it receives every blink of sunshine; and the long chimney-pots (so to speak) that he used to grow the Pines in stand useless at the back of the house.

But why did not the Royal Horticultural Society take the matter in hand and carry the plan into thorough effect, by which means they would have turned out their pupils more fully accomplished? Instead of which they gave up Pine-apple growing altogether: instead of doing "something for gardeners" they have fallen, since Mr Knight left them, from the highest pinnacle of philosophic fame to that of issuing a company of itinerant floral adventurers who go about the country to hold shows of flowers of other people's cultivation, to "turn the penny" for the all-devouring South Kensington.

When the large-hearted Mr Paterson, then gardener to the Earl of Chesterfield, held his universally public show by the side of the Royal Agricultural Exhibition at Northampton, he said, If I have a surplus of cash over its expenses, as no man can claim it, we will devote it to the support of the widows and orphans of our class. Rut has the Royal Horticultural Society said anything of the kind about their surpluses at their provincial shows 1 Nothing of the kind. Rather than do anything for the unfortunate creatures mentioned above, they try to "please" the gardeners by holding a mock congress, and take every original idea sent thereto off to South Kensington. If any one could claim the surplus (1000) which they took from Birmingham the other day, I should say that the Birmingham Botanical Society should be the first claimant on the list. John Pearson.

Kinlet, near Bewdley, February 12, 1873.