Still we advance; leaving San Isidro we had but gone about 5 miles untill we ran into an ambuscade. They (rebels) killed 7 of our men before they ran away but leaving a few dead themselves. We made Cabio [Cabiao] tonight we are traveling westward now toward the railroad where Gen. [Arthur] Macarthur is operating. The object of our expedition is to keep the insurgents from retreating east to the mts. While Mcarthur is pounding them along the R.R.