I'd like to see a picture of a Lefever with a rotary bolt.
All the Lefever Arms Co. doubles I've seen were bolted by a wedge into a notch in the dollshead rib extention. Part C in this diagram --
L.C. Smith, Philadelphia Arms Co., A.H. Fox Gun Co., some J. Stevens Arms & Tool Co. doubles and NID model Ithacas are the guns I know of using the rotary bolt.