A more thorough explanation:

An ancient document is a tangible object that contains words, symbols, or marks that have been recorded. It can be used as evidence to prove a fact. Examples of ancient documents include deeds, agreements, title papers, letters, receipts, and other written instruments.

These documents are presumed to be authentic because of their physical condition, the length of time they have existed (20 or more years), and the fact that they have been maintained in proper custody. They are also known as ancient writings.

For example, a will that was written 50 years ago and has been kept in a safe deposit box would be considered an ancient document. Its physical condition and the fact that it has been kept in proper custody suggest that it is authentic.

Other types of documents include foreign documents, which originate from or were prepared in a foreign country, and public documents, which are issued or published by a political body or connected with public business.

Overall, ancient documents are important pieces of evidence that can be used to prove a fact in a legal case.