Coverstones to the Tagrean Stargate

"Back in the Milky Way, some cultures actually bury their gates to render them useless."
Rodney McKay[src]

Coverstones are a series of tablets often placed over Egyptian tombs. The Stargates found on Earth and Tagrea were both buried under coverstones that had a cartouche in the center of them. (Stargate) (SG1: "Memento")

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