"old documents" is correct and usable in written English.
For example: "We searched through some old documents to uncover clues about the building's history."
Perusing old documents is a preferred activity of Modiano's.
"These are old documents taken out of context," it said.
So, she'd read these old documents in Chinese.
She has sifted through thousands of old documents and drawings.
Until then, we're stuck with the old documents.
To date, Mr. Hasan has cajoled these ministries into relinquishing around 600,000 old documents.
The CIA has declassified centuries-old documents.
Mr. Xu said that he thought the five-decade-old documents had long since been declassified.
This the 59-year-old documents in the opening chapter of his riveting book, Absolutely Foxed.
A collection of 300-year-old documents detailing Scotland's role in the failed Darien project has been put on show at the National Library in Edinburgh.
A dusting off of centuries-old documents points the spotlight in their direction.
