"The Senators and Representatives shall receive a compensation for their services, to be ascertained by law, and paid out of the Treasury of the United States."
- Article 1, Section 6, Paragraph 1 of the original Constitution
The Bill of Rights was the first ten amendments to the Constitution ...
So most people in this country today have heard of the Bill of Rights, and how it consisted of the first ten amendments to the Constitution - although many who once knew this have since forgotten in the years since they left high school. Here's the part of the story that your history classes might not have taught you, about the amendment that never made it into the Bill of Rights.
United States Bill of Rights