The New York Times (NYT) has released all of its public-domain articles from 1851-1922 as image-based PDF documents. The collection, which includes all 11 million articles from 1851-1980, is currently available, free-of-charge from the NYT web site.
This move is part of the elimination of the TimeSelect suite of subscription-based services, which has been made free-of-charge in response to changes to the 'online landscape' since TimeSelect was originally launched in 2005. You can read more in NYTimes.com Senior VP and GM Vivian Schiller's letter to readers and Derek Gottfrid's blog post.
Whether you're a history buff, a researcher or just plain curious, you can check out the archive on the NYT web site.
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OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.