Our surgeons began to prepare for the coming battle, by appropriating several buildings and fitting them up for the wounded--among others the stone church at Centerville--a church which many a soldier will remember, as long as memory lasts. Late that evening as I was returning from this church, accompanied by Mr. and Mrs. B., I proposed that we should walk through the entire camp to see how the boys were employed, on this, the eve of their first battle. We found many engaged in writing by the glimmering light of the camp-fire--soldiers always carry writing materials on a march; some were reading their bibles, perhaps with more than usual interest; while others sat in groups, conversing in low earnest tones; but the great mass were stretched upon the ground, wrapped in their blankets, fast asleep, and all unconscious of the dangers of the morrow. We were about to return to our quarters in a log cabin built by the rebel soldiers, and which had been evacuated only a few days previous, when we heard several voices singing in a little grove not far from camp. We turned and walked toward the grove, until we could hear distinctly, the words of the following beautiful hymn: "O, for a faith that will not shrink, Though press'd by every foe, That will not tremble on the brink Of any earthly woe; That will not murmur or complain Beneath the chastening rod, But, in the hour of grief and pain, Will lean upon its God; A faith that shines more bright and clear When tempests rage without; That, when in danger, knows no fear, In darkness knows no doubt." "Ah!" exclaimed Mr. B., "I recognize Willie L.'s voice there. I understand now; this is Willie's prayer meeting night, and notwithstanding the fatigue of the march and blistered feet, he has not forgotten it." We drew nearer to listen to and enjoy the exercises unperceived, for no sooner had the last words of the hymn died away on the still midnight air, than Willie's clear voice rose in prayer, filling the grove with its rich, pathetic tones. He prayed for victory on the morrow, for his comrades, for loved ones at home, and his voice grew tremulous with emotion, as he plead with the Saviour to comfort and support his widowed mother, if he should fall in battle. Then followed a practical talk about being faithful soldiers of Jesus, as well as of their beloved country; of the necessity of being prepared at any moment, to lay down the cross and take up the crown. One after another prayed and spoke, until about a dozen--and that included the whole number present--had addressed the Throne of Grace, and testified to the power of the Gospel of Christ in the salvation of sinners. No one was called upon to pray or speak, no one said he had nothing to say and then talked long enough to prove it, no one excused his inability to interest his brethren, and no time was lost by delay, but every one did his duty, and did it promptly. We retired feeling refreshed and encouraged.