He was referring to the Constitution.
Abraham Lincoln
== ==
four score and 7 years ago
Abraham Lincoln get them oodles
Four score and seven years ago
President Abraham Lincoln spoke this phrase as part of his famous Gettysburg Address.
A score means twenty. Therefore, Lincoln's speech which said "four score and seven years ago" is referring to 87 years ago.
Four score is a number. A score is twenty, as a dozen is twelve. Four score is 80.
President Lincoln's Gettysburg Address in 1863. This speech was written on a napkin during the train ride to where the speech was being held. Four score and seven years is 87 years, a reference to 1776 when we declared our independence from the British.
Lincoln
4 score = 40 years... "4 score and 7 years ago", in the words of Abraham Lincoln, is 47 years.
A score means 20. Hence in the Gettysburg Address when Lincoln referred to "four score and seven years ago" he meant 87 years ago.