Letters have been received from Dr. WOLFF by the committee of the Stoddart and Connolly Fund, dated Erzroum, Armenia, Dec. 16 and 19.   The doctor was detained by a fall of snow, but expected to start on the 21st, to reach Tabreez on the 7th January, and to arrive a Tehran about the 20th .  The Pacha of Erzroum gives him letters, provides a guard, and pays his expenses to the frontier, Dr. WOLFF has received every attention from Col WILLIAMS , the British commissioner, and from Mr. BRANT, the consul.  Intelligence has also been received from Constantinople, dated the 2 nd instant, which states that some people had arrived who left Bokhara within three months.  Stoddart was alive, in high favour, and no public execution of a Frank had been heard of.