As an occasional researcher at the National Archives and the Library of Congress, I have paid particular attention to news accounts about the apparent unauthorized removal of historic documents from both facilities. I have to agree with Post staff writer Karlyn Barker {Metro, Aug. 20}: it does seem as if "anyone using the precious documents can hide them on the body and make off with them." The motivation for such an act would usually be money.

However, I wonder if a corollary has ever been considered by officials in charge of security at these facilities: if anyone could easily remove documents, then anyone could also easily add documents.

At first glance this might seem preposterous -- why would anyone go to the trouble of smuggling something in? Nevertheless, I believe there is at least one logical motivation for "salting" our national archival and research repositories with bogus documents: to provide evidence to prove a historical theory.

It is not beyond the realm of possibility to conceive of a scholar who has staked his reputation on a particular theory or version of history hoping to stack the deck in his favor by strategically adding to the Archives fake documents that he or someone else could subsequently "discover." As Karlyn Barker wrote, "the sheer volume of documents makes it impossible to catalog every piece of paper individually."

It is clear that either removal or addition of materials would be a gross violation of the integrity of our national research centers. ELLA VABADUS Huddleston, Va.