Few persons, we believe, who have not had occasion to consult these parliamentary volumes in a systematic manner, are at all aware of the immense labour that is bestowed upon them, and the care and completeness with which they are compiled and arranged. Indeed, we daresay few readers have any accurate notions of the actual number of parliamentary papers annually issued, or of the nature of their contents. From even a very cursory examination of the literary result of a parliamentary session, the previously uninformed investigator could not fail to rise with a greatly augmented estimate of the functions of the great ruling body of the state--the guarding and directing power in the multitudinous affairs of the British Empire--an empire that extends over every possible variety of country and climate, and includes under its powerful, yet mild and beneficent sway, tribes of every colour of skin, and of every shade of religious belief. Such a survey, in fact, tends to impress one more fully and immediately than could well be fancied, with the magnitude of the business of the British legislature, and the consequent weighty responsibilities imposed upon its members. But, great as the burden is, it is distributed over so many shoulders, that it appears to press heavily, and really does so, only on a few who support it at the more trying points. The session 1851 is the latest of whose labours, as they appear in the form of parliamentary records, an account can be given. By the admirable system of arrangement we have referred to, each parliamentary 'paper,' whether it issues in the shape of a bulky Blue-book--that is to say, as a thick, stitched folio volume, in a dark-blue cover--or as a mere 'paper'--an uncovered folio of a single sheet of two or four pages, or several stitched together, but not attaining the dignity of the blue cover--is marked as belonging to a certain class; and when the issue of the session is complete, a full set of 'Titles, Contents, and Indexes' to the whole is supplied, so that they can all be classified and bound up in due order with the utmost ease and celerity. The _Titles, Contents, and Indexes to the Sessional Printed Papers of Session_ 1851 are at present before us, in the shape of a folio Blue-book about an inch and a half thick, from which we think we may pick some facts of interest.