Both chambers open their daily sessions with prayer. Clergymen of nearly all denominations have served as Chaplains, including Father Pise, a very eloquent Catholic priest who was a close friend of Henry Clay and was invited at his instance to lead the devotions of the Senate. As a rule, the prayers are extemporaneous, and it seems almost inevitable that, in periods of political upheaval, some color of partisanship should creep into them. Yet such slips have been very rare indeed. The most startling was made by the late Doctor Byron Sunderland, who was Chaplain of the Senate in 1862. He was the foremost Presbyterian minister in Washington and a strong anti-slavery advocate. One day Senator Saulsbury of Delaware, who was an accomplished biblical scholar, made a speech reviewing the references in the Hebrew scriptures to human servitude, as proof that slavery was of divine origin. Doctor Sunderland, having left the hall, did not hear the speech made, but was told about it when he arrived at the Capitol the next morning. He was nettled by the news, and, before he was fairly conscious of it, he caught himself saying something like this in his opening prayer: “Oh, Lord God of Nations, teach this Senate and all the people of this country that, if slavery is of divine institution, so is hell itself, and by Thy grace help us to abolish the one and escape the other!” These few words caused a great sensation, and later in the day Mr. Saulsbury vented his indignation in a resolution to expel the offending clergyman from the chaplaincy; but some quick-witted Senator on the opposite side cut off debate by moving to adjourn, and the matter died there.