The illustration pleased me for a different reason, namely, because, being a student of bird-life, his contrasted picture of the two widely different kinds, when deprived of liberty, struck me as being singularly true to nature, and certainly it could not have been more forcibly and picturesquely put. For it is unquestionably the fact that the misery we inflict by tyrannously using the power we possess over God's creatures, is great in proportion to the violence of the changes of condition to which we subject our prisoners; and while canary and eagle are both more or less aerial in their mode of life, and possessed of boundless energy, the divorce from nature is immeasurably greater in one case than in the other. The small bird, in relation to its free natural life, is less confined in its cage than the large one. Its smallness, perching structure, and restless habits, fit it for continual activity, and its flitting, active life within the bars bears some resemblance except in the great matter of flight, to its life in a state of nature. Again, its lively, curious, and extremely impressible character, is in many ways an advantage in captivity; every new sound and sight, and every motion, however slight, in any object or body near it, affording it, so to speak, something to think about. It has the further advantage of a varied and highly musical language; the frequent exercise of the faculty of singing, in birds, with largely developed vocal organs, no doubt reacts on the system, and contributes not a little to keep the prisoner healthy and cheerful.