Havana, Jan. 5. - There is great indignation here among the Cubans on account of the news that Dr. Zertuche haa been engaged as a guide for the Spanish troops, and will soon leave for Pinar del Rio with General Weyler. There are few men who know that province as well as Dr. Zertuche, who was for a long time a physician In Melena del Sur and other small towns. As mayor of Melena before the war, he had occasion to study the topography of the country and all the stategic points in the mountains. He is now living in a house on Animas street in Havana, surrounded by a strong guard of policemen to protect him against any attack from the Cubans, because it is said they have sentenced him to death on account of his act of treachery against General Maceo.