In five or six days the condition of the patient begins to improve rapidly.

By the end of the second week his horrible sores have healed.
It was with this remedy that we began our health work among some of the wilder head-hunters of northern Luzon.

Think of the advantage of being absolutely certain of curing such an ailment in every case, and think of the gratitude of poor wretches, undergoing untold suffering, when they were almost immediately relieved! Soon after this use for salvarsan was discovered, I caused a liberal supply of it to be sent to the Bontoc Hospital.

For some time we were unable to persuade any victims of yaws to undergo treatment, but finally we found one at Barlig who was guilty of a minor criminal offence, arrested him, and took him to Bontoc.

Instead of putting him in jail there, we sent him to the hospital for treatment.
At first he complained bitterly that we were putting no medicine on his sores.