In a friends Nitro Special I found a note that he had written as a ten year old expressing his delight at getting a gun. He had forgotten the note completely. We copied the note and put it back.
In another friends Model 8 Remington we found his grandfather had put a spare set of sights, spare firing pin and spring and his name and address. His grandfather hunted deer and bear in Maine.
I ALWAYS look under the buttplate.