• cope (edward drinker) -- vs -- marsh (orthniel charles)

• school: pennsylvania -- vs -- yale

• museums:
  • h.f. osborne (amnh) - (1857-1935) - vs -
  • uncle g. peabody - (1795-1869)

• dinosaur discoveries: 56 - ccm -- vs -- 80 - sadt

• died: 1897 (57) -- (1840-97) vs died: 1899 (68) -- (1831-1899)

• misc:
  • kope: kansas -- plesiosaur: elasmosaurus (marsh showed head was on wrong end)
  • cope's skull is in the museum - dared marsh to compare brain sizes

Yes, dr. leyden knows a lot of 'trivia' -- but how does he remember all that stuff?
When first outlining this information i noticed that everything dealing with COPE was either

• 'a lower number'
• 'occurs earlier in the alphabet'
  • (C) in Cope comes before (M) in Marsh
  • (E) in Edward (Cope) comes before (O) in Orthniel (Marsh)
  • (P) in Pennsylvania comes before (Y) in Yale
  • etc.