This man's name is listed as "Clem T. Johnson" in the American Civil War Research Database

Case from the case-book of LINCOLN HOSPITAL, Washington, D. C.; Surgeon J. Cooper McKee, U. S. A., in charge.

CASE 420.—Corporal Clem P. Johnson, company D, 140th Indiana volunteers; age 30; admitted as a convalescent from the general hospital at Jeffersonville, Indiana, March 1, 1865. Chronic diarrhœa. Died, March 9th, of pleuro-pneumonia. Autopsy nine hours after death: Height five feet eight inches; body considerably emaciated. The larynx was œdematous and somewhat congested. The right pleural cavity contained fourteen ounces of serum, the left pleural cavity ten ounces. There were pleuritic adhesions on both sides, which appeared to be old on the left side, recent on the right. The right lung weighed thirty-seven ounces; it was almost completely hepatized; in its upper lobe there were a number of purulent deposits; the left lung weighed thirty-four ounces and a half; its upper lobe was hepatized, its lower lobe congested. The heart weighed nine ounces; there were fibrinous clots in both ventricles. The pericardium did not contain an unusual amount of fluid. The liver weighed eighty-seven ounces, but was normal in appearance. The spleen weighed thirty-nine ounces and a half. The jejunum was somewhat congested in three or four places; the ileum congested, and in its lower part ulcerated. The ileocæcal valve was ulcerated, and dark colored, as if gangrenous. The upper part of the colon was ulcerated, lower down it presented nothing abnormal. The kidneys and pancreas appeared to be healthy.—Acting Assistant Surgeon E. B. Harris.