The last L.N.A.&C Employee Timetable (#28) does NOT mention "Monon Route. Its successor, CI&L Timetable #1 (Effective 5:00 am November 28, 1897), has "MONON ROUTE" in bold letters on its cover beneath Chicago Indianaolis & Louisville Ry. Co. in larger type.
There also exists a photocopy of a public timetable dated August, 1897 with MONON ROUTE in the lozenge herald with Chicago, Indianapolis & Louisville Ry. Co. under it in smaller letters.
According to Hilton, in Monon Route (pg 51) the L.N.A.&C. first used the name (Monon Route) on a US Map issued in November 1882.