"The act of cutting away the branches alarmed my sombre little friend (I knew that the nest was tenanted, as the bill and head were distinctly visible through the lateral entrance), and out she darted with such a '_whir_' that anything like satisfactory identification for a bird of this sort was utterly hopeless. The nest contained four beautiful little eggs, so that to bag the parent bird was a matter of the first importance; all my attempts, however, first to capture her on the nest and next to shoot her as she flew off, were equally futile, her movements being as rapid and erratic as forked lightning. And here let me give a word of advice to my brother ornithologists: Never attempt to shoot a _wary little bird in the act of leaving its nest_, as you only run the risk, and mortification I may add, of wounding perhaps an unknown bird, in which case she will never again return to her nest; but _lie in ambush_ for her with, outlying scants, _and make certain of her as she is returning to her nest_. She will first alight on a neighbouring tree, then on one closer, coming nearer and nearer each time; finally, she will perch on the very tree or bush in which the nest is built, and while taking a look round to see that all is well before making a final ascent, you have yourself to blame if you fail to bag her. All this sounds very cruel; but if a bird must be shot for scientific purposes, it is surely preferable to kill it outright than to let it die a lingering death. Thus it was that I eventually succeeded, even at the expense of being devoured alive by midges and mosquitoes; but then had I not the satisfaction of knowing that to become the happy possessor of _authentic_ eggs of _Acrocephalus dumetorum_ was in itself sufficient to repay me for my hill excursion! "I cannot, however, pretend to lay claim to originality in the discovery of the breeding-habits of this bird, for Hutton's description of the nest and eggs taken by him so fully accords with my own experience, that it is but fair to conclude he was correct in his identification. I would add, however, with reference to his remarks, that the nest above alluded to was _more elliptical_ than _spherical_, being about the size and shape of an Ostrich's egg, that it was constructed throughout of the _largest_ and _coarsest_ blades of various kinds of dry grass, the egg-cavity being lined with grass-bents of a finer quality, and that it was domed over, having a lateral entrance about the middle of the nest. The whole structure was so loosely put together as to fall to pieces immediately it was removed. "The eggs, four in number, are pure while, beautifully glossed, and well covered with rufous or reddish-brown specks, most numerous at the obtuse end. Owing to its similarity to a number of eggs, particularly to those of the Titmouse group, it is just one of those that I would never feel comfortable in accepting on trust.