The gate-lodge at Blithewood, on the Hudson, the seat of R. Donaldson, Esq., is a simple and effective cottage in the bracketed style-octagonal in its form, and very compactly arranged internally. Nearly all the fine seats on the North river have entrance lodges-often simple and but little ornamented, or only pleasingly embowered in foliage; but, occasionally, highly picturesque and striking in appearance.