Brown writes from Paris that he received Sheldon's letter and hopes Sheldon will recover in the warm weather; the Henry and Henry 4th have arrived at Havre and he expects his letters and dispatches tomorrow and if they contain any important intelligence, he will communicate it Sheldon; discusses Gen. Jackson and Mr. Adams; Mrs. Brown's health; encourages Sheldon to throw away all his cares and concerns and attend only to the improvement of his health.