The MESOPOLITES, or Metropolitans, are to be attached to the archive-office, and to be taken care of in the Union-house, when in straits through age or misfortune. They will be occupied in the department of the sciences or arts, which this Association profess principally to cherish. They are also Brethren of the third degree of Scotch Free Masonry, a qualification to be explained afterwards. The Union-house is a building which the ostensible Founder of the Union professed to have acquired, or speedily to acquire at ----, through the favour and protection of a German Prince, who is not named. ALDERMEN are persons who hold public offices, and are engaged to exercise their genius and talents in the sciences. These also are Brothers of the third rank of Scotch Free Masonry, and out of their number are the Diocesans and the Directors of the Reading Societies selected. The members who are designed simply MEN, are Brothers of the second rank of Masonry, and have also a definite scientific occupation assigned them. The CADETS are writers who have not yet merited any particular honours, but have exhibited sufficient dispositions and talents for different kinds of literary manufacture. Every member is bound to bring the productions of his genius to market through the Union. An Alderman receives for an original work 80 per cent. of the returns, and 70 for a translation. The member of the next class receives 60, and the Cadet 50. As to the expence of printing, the Alderman pays nothing, even though the work should lie on hand unsold; but the _Man_ and the _Cadet_ must pay one-half. Three months after publication at the fairs an account is brought in, and after this, yearly, when and in what manner the author shall desire. In every Diocese will be established at least one Reading Society, of which near 800 are proposed. To each of these will a copy of an _Alderman's_ work be sent. The same favour will be shown to a dissertation by a _Man_, or by a _Cadet_, provided that the manuscript is documented by an Alderman, or formally approved by him upon serious perusal. This _imprimatur_, which must be considered as a powerful recommendation of the work, is to be published in the _General Review_ or _Gazette_. This is to be a vehicle of political as well as of literary news; and it is hoped that, by its intrinsic worth, and the recommendation of the members, it will soon supplant all others. (With respect to affairs of the Union, a sort of cypher was to be employed in it. Each Diocesan was there designed by a letter, of a size that marked his rank, and each member by a number. It was to appear weekly, at the very small price of five-and-twenty shillings.)--But let us return to the plan. When every thing has been established in the manner set forth above, the Union will assume the following republican form, (the reader always recollecting that this is not to appear to the world, and to be known only to the _managing_ Brethren.