Simplify the following text for a Grade 10 native English-speaking person.
Original: This story is at odds with the existence of several early drafts on Executive Mansion stationery as well as the reports of Lincoln 's final editing while a guest of David Wills in Gettysburg .
Simplified: There are several early copies on Executive Mansion paper , and reports of Lincoln finishing his speech while he was a guest of David Wills at Gettysburg .