Iu-w York, Maich, 17. A special to the Times say.s Gen. Hoiikar and Medionl Director Lettertnun proDOuncé the A-rny of the Potomao to bo thü htmltftiést armv he world has ever known. Tha health of that arrry ih rtmeh superior to thut of tliü rebel anny oo tliö opposite banu of tlie Rappahonñock. It is siiid the difficultiea vvliich constrained Gen. Sigül to tendor his resig. nation have baen adjusted, nnd th;it ha "will withdraw his resigrtatii-Q and return to his old comraand. Miss Ford, whoso namo is connected with G-en. Stoogfeton'fl capture at Fairfax, has been arrested. Soine papers if an important character vvero found upon her person, and 'Jirough them it a learned that a raid h.-.d boen planned for Satnrday. Eleven oí the so-called guerrillaa who took Ihe (J-eneral under irrest say only twenty-four partioipated in the raid and oo ono of tliern lived igh müc fi-oi-n Fairfitx.