As you talk to your readers through the medium of the Horticulturist from month to month, it is natural that they should feel at times a desire to ask some questions make suggestions, or at least to acknowledge their satisfaction or approval of what you say upon such subjects as are of particular interest to them. With some such feeling as this I have taken up my pen for the purpose of thanking you for the series of articles you are giving your readers in relation to the Central Park.

I have read these articles with much interest, not only so far as they have reference to this particular work, but as they are applicable to the arrangement and working of other ornamental grounds. Every person who has given any considerable attention to this subject, must feel that just such strictures as you have made are highly practical, and much needed in most works of this kind all over our country.

It is expecting, perhaps, too much from the managers of the Central Park to suppose that they will give an example of arrangement, planting, and ornament, the best possible in all respects. Yet this should be their aim; and any hints or suggestions, pointing out material errors or defects which may exist, should be noticed and corrected before the work•has so far progressed as to render this much more difficult than it would be at the present time.

A work like this, destined to be an example for other similar works in this country, and which, in some of its features, will be largely copied by those who have grounds of smaller extent, should be an example in every respect of the highest and most finished style of Landscape Gardening - perfect, so far as possible, in all its details.

With the means placed at the disposal of those having this undertaking in charge, the public will hardly be satisfied with any thing less than the best work that the best talent of this country can supply.

The example you have referred to, that of Mr. Kelly, at Rhinebeck, as an example of grouping, of its kind, is quite unexceptionable, only lacking - if in any thing - in the element of evergreens to give a little more variety to the various groups; but of this I am somewhat in doubt. As seen on a bright and sunny day in August or September, one can scarcely imagine a more lovely scene than that presented by the fine lawns and beautiful grouping of trees upon this place.

Where the surface is more uneven and rough, as at the Central Park, evergreens could be used to a much greater extent, and be made effective.

The lawns at Mr. Sargent's, at Fishkill, show to what perfection this particular and necessary branch of Landscape Gardening is capable of being carried; and while we approve of the closest approximation to this example which may be available, yet we think that in a ground so large as the Central Park, the three-day system of clipping the lawns will hardly be looked for, unless in certain highly cultivated parts of it. It occurred to me that the splendid old trees at Montgomery Place, at Barry town, would be a good example of what some of the trees now planted in the Central Park, at the distance of six or eight feet apart, might become in time, and also as showing what might hereafter be their appearance upon some of the smaller plots, as now planted.

At this place, also, are fine examples of what can. be done in grouping together the different families of trees, and those that are similar in foliage. We somewhat doubt, however, the possibility of giving all the variety required in such grounds as the. Central Park, by a close adherence to this rule. While making these general remarks in reference to the Central Park,-1 will give you the result of some of the impressions made upon me while visiting there in July last, and of which I made notes at the time - even at the risk of repeating several things you have already noticed. I went there, as others do, expecting to find an example of the highest excellence in the art of Landscape Gardening, and it was with a feeling of great satisfaction, almost immediately upon~entering the grounds, that I noticed what then, and afterward seemed to be some of the best features of the work yet done in the Park. In the smoothness and finish of the surface grading, the easy and natural rolling grades, the absence of flat surfaces and depressions in the plots, it exhibits a pleasing adaptation to the requirements of the ground, while the deep covering of broken stone upon the roadways shows a thorough preparation of the foundation for securing good roads and walks.

The sunken crossings is a happy thought, and, if well carried out, will be not only a great convenience, but an effective feature in the appearance of the Park.

The attempts at planting along the Mall with large Elm trees is a sore feature in this part of the Park, and the idea of ever realizing from them even passable specimens of good trees seemed to me perfectly hopeless.

A few specimens of the English Elm that were planted in their vicinity were now more thrifty, and promise far better for the future, than any portion of those miserable and mutilated examples of one of our most noble forest trees.

The elaborate stone work at the termination of the Mall near the lake, although not fully comprehended, seemed to contemplate a large expenditure of money to produce a very doubtful effect; and, indeed, the straight and stiff lines of the Mall itself do not well harmonize with the graceful and easy curves of the roads in other portions of the Park.

The crowded style of planting large growing trees within a few feet of the roads and walks, and of each other, is suggestive of much work in removal, and a failure of producing in future a satisfactory arrangement of grouping. In the multiplication and repetition of similar groups along the roads and walks there is a want of adaptation to the requirements of a ground so diversified in its character.