DEAR SIR: Your communication of the 5th ultimo reached me per last mail under cover from General States Rights Gist, with an explanatory note from that gentleman in relation to the subject-matters thereof. The mode employed by your Excellency to collect authoritatively the views of several of the Executives of the Southern States as to their plan of action in the event of the election of Lincoln, commends itself warmly to my judgment. Concert of action can alone be arrived at by a full and free interchange of opinion between the Executives of the Cotton States, by whom it is confidently expected that the ball will be put in motion. We are in the midst of grave events, and I have industriously sought to learn the public mind in this State in the event of the election of Lincoln, and am proud to say Florida is ready to wheel into line with the gallant Palmetto State, or any other Cotton State or States, in any course which she or they may in their judgment think proper to adopt, looking to the vindication and maintenance of the rights, interest, honor, and safety of the South. Florida may be unwilling to subject herself to the charge of temerity or immodesty by leading off, but will most assuredly cooperate with or follow the lead of any single Cotton State which may secede. Whatever doubts I may have entertained upon this subject have been entirely dissipated by the recent elections in this State. Florida will most unquestionably call a convention as soon as it is ascertained that a majority of the electors favor the election of Lincoln, to meet most likely upon a day to be suggested by some other State. I leave to-day for the capital, and will write you soon after my arrival, but would be pleased in the mean time to hear from you at your earliest convenience. If there is sufficient manliness at the South to strike for our rights, honor, and safety, in God's name let it be done before the inauguration of Lincoln. With high regard, I am yours, etc., M.S. PERRY Direct to Tallahassee. P.S. I have written General Gist at Union C.H.