Correspondevce brtween Mr. Masón and Mr. Conway. The London Times publishes the fol loting correspondunco : Sir - As a part of the politica] history of the times, the correupondenee transmitted herewith may huve sufficient significanee to cali for publieatioD. I anbinit it to yon accordingly for a placo in your columns. I íim, B,ir, very respect fullv, your ob"t serv't, J. M. Masón, No. 24 Upper 8eym'nur nirt't't, Portman Squure, Jane 17, 1863. Aubrey Honse, Noltinar Hill, ) London, Juno 10, 1863. S1R - I Iiüvo authority fo mnke the following proposition on bchulf of the lead ng aiiti-slavery men oi America, who llave sent me to this country. If the States calling theraselves "the Confedérate States oí Arnerici" will consent to emancípate tle negro nlaven in those States, such emaneipntion to be guaranteed by a liberal European commission, the ciiisuicipütion to bu ináugurated at once, and such time to be allowed fur its completion as the com mission hall adjudge to be necenRary and jüst, and such omancipation once made to be irrevocable - then the abolitionists and anti slavery leaders ot the Northern States shall imrnediatelv oppose the proseoution of tho war on the part of the United States government, and, sine tliev hold the balance of power, wil! cerf ainly cause the war to ceaee by iho immodiute withdrawal of overy kind of support from it. I kuow t'fiát the ultimate decisión npon po grave a proposi'ion rnay rcquire some lime; but meanwhile I beg to be informed at your eiirly c.onvenienoe wbelher you wil] personally lend ynur ioéuencé in fayor of u restoration of peaoe and thu indepeurlence of the South upon the simple basis of the emnncipation tt the alavés. Any punrantee of' niy own refponnibility and rny riht to tnake this offer hall be forlhuoninL. I aiu, sir, yours, &o., Moncuüb D Conwat. J. M Mapon, Esq. No. 24 Upper Seymour Street, Í Portman Square, Judo !1, 1863. ) fi1B - I have your note of yesterday. TIk proposition it coniains ia c;ort ainly wnrthy of the gínvest consideration. proviii d it ís made under a proper respoBsibtlity. You must be a ware that, hile you know fully the representativo position I ficcupy, I nave not the like assurance as regard? yoursWf. It you think proper, thereforo (o commd.nicate tó me whp thone are on whose bohalf and authnrity yoti make he proposition reforred to, with the vidence of your "right to make this ffer," I will at once give you my rejy - the charaeter of whieb, wbich, lowever, must depend on vhat I may earn of your autlioiity in the premies. I am, sir, your ob't serv't, J. M. Mason. Moxcurr D. Conway, Esq. Aubrey House, Notting Hill, ) June 16, 1863. ( Sir- Tour note of the llth has been received I coukl easily pvo you the evidence th'at I represent the ciews of he leiidirifr abolitionists of America, Mit with regard to the special offer which I have n:ade I have concluded bat it was best to vvrite fiut to America and .btain the evidence oí mv riqjnt to make it in a torm whieb will preelude any doubt as to its efficiency, I ph:dl thon adiireps ,you again on the subject. I am, wir, yours, etc, Moncdue l). Conway. J. M. Masón, E"q. No 24 Upper Soymour street, ) Portman Square, June 17, 1863. ) giu - I have receivèd your note of yesterday. You need not wnte to America to oltnin tho evidence of your right to treat on the matter of its import. Our corresponderse doses wiih this reply. lt was your pleasure to commeuce it, it is mine to termínate it. I desired lo know who they vvere who were responsih'e for your mission to Enghind, as you present it; and wlio vvere to confirni the trenty you pro piped to ma!; for arTesting the war in Amoriuii, on a bíisis of a separation of the Stutte, witli or without the sanction of their governinent. Bilt such information is of the !h98 valiie now. as I find an advertiseint'iit in the journal oí thü üaV Illa; yon nave iuuuiii m JJiíglancl íetters of si'ffl 'ent credit frotn those who sent yon to invite a public rneeliüg m London, ótifler the siinction of i mertíb' v f Parliamont, who v;8 to presido to hear ;in nddres frotn yi-u on the t.ubj'ci of your misión, with the promiSé oí u 1 'i k e address from him. The cniTcnpondence shall g' to the public-, und vill find te way to the country i cln.sa of tho cilizuns of which i you tljtfl to represent, It will, perhaps, interest the governrrent and Úo soi-dtsant ' loyal men" the're to bn'é'W, ufider thc aanction oi vour name, tliat the "leading anti-sla very men in America" are prepared tn nepotiute with the mHhoritR'n of the. Confedérate Staten for a "rentonition ,f p:aco, nel llie independenoe of the Soinh, on u pledice (.hut tho abulitionints mul iinti-i-lavery men of the Northern States sh;:ll i:nnedif.!('ly Appbite the fm-ther pro-i"Miiii)ii of th war on the part of tho ünited iStv.tes tiovernment, and, fince they hold the balance of power, will certainly oauso the war to ceaso by the immediate wilhdrawal oi every kind (i Hupport ÍVom il." As sonie l'jwarl, hnuevur, for lliis interestin? (üsclnsurc, vonr inqniry Whether the Confedérate States will fjonííjn.i; t? e!,Tinri:i a'ion on tlio tenr.s stated fctiall not go wholly uoanswered. Yon muy be ansured, then, and it muy be of vülue to yonr conStituents to as sure tliem tliat fhè Northern Biates wil! never be in relations to put the qnestion to the South, nr wil] the Southern States ever be in a position requiring them to give an anwer. T urn. sir. vour oh't serv't.