| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Mason vs J Mortimer |
 | 1-0 | 35 | 1883 | London | C77 Ruy Lopez |
| 27. Mackenzie vs J Mortimer |
| 1-0 | 62 | 1883 | London | A10 English |
| 28. J Mortimer vs A B Skipworth |
| 1-0 | 67 | 1883 | London | C13 French |
| 29. J Mortimer vs A G Sellman |
| 0-1 | 45 | 1883 | London | C14 French, Classical |
| 30. J Noa vs J Mortimer |
| 1-0 | 51 | 1883 | London | C65 Ruy Lopez, Berlin Defense |
| 31. J Mortimer vs S Rosenthal |
 | 0-1 | 52 | 1883 | London | C39 King's Gambit Accepted |
| 32. J Mortimer vs Steinitz |
| ½-½ | 63 | 1883 | London | C33 King's Gambit Accepted |
| 33. Blackburne vs J Mortimer |
| 1-0 | 33 | 1883 | London | B46 Sicilian, Taimanov Variation |
| 34. J Mortimer vs Bird |
| 0-1 | 27 | 1883 | London | C33 King's Gambit Accepted |
| 35. J Mortimer vs Englisch |
| 0-1 | 29 | 1883 | London | B01 Scandinavian |
| 36. Steinitz vs J Mortimer |
| 1-0 | 42 | 1883 | London | D32 Queen's Gambit Declined, Tarrasch |
| 37. Mackenzie vs J Mortimer |
| 1-0 | 36 | 1883 | London | C77 Ruy Lopez |
| 38. J Mortimer vs Winawer |
| 0-1 | 51 | 1883 | London | C17 French, Winawer, Advance |
| 39. Mason vs J Mortimer |
| 1-0 | 54 | 1883 | London | C54 Giuoco Piano |
| 40. Zukertort vs J Mortimer |
| 0-1 | 42 | 1883 | London | C52 Evans Gambit |
| 41. J Mortimer vs Chigorin |
| 1-0 | 55 | 1883 | London | C59 Two Knights |
| 42. G MacDonnell vs J Mortimer |
| 1-0 | 22 | 1884 | Casual game | C25 Vienna |
| 43. J Mortimer vs G MacDonnell |
| 1-0 | 32 | 1885 | 1st BCA Congress, London | C41 Philidor Defense |
| 44. J Mortimer vs T Hewitt |
| 0-1 | 19 | 1885 | 1st BCA Congress, London | C33 King's Gambit Accepted |
| 45. J Mortimer vs R Loman |
| ½-½ | 56 | 1885 | 1st BCA Congress, London | C33 King's Gambit Accepted |
| 46. Gunsberg vs J Mortimer |
| 1-0 | 41 | 1885 | 1st BCA Congress, London | C22 Center Game |
| 47. W Pollock vs J Mortimer |
| 1-0 | 31 | 1885 | 1st BCA Congress, London | C46 Three Knights |
| 48. J de Soyres vs J Mortimer |
| 0-1 | 38 | 1885 | Ruskin Prize t | C52 Evans Gambit |
| 49. J Mortimer vs G Wainwright |
| 0-1 | 56 | 1885 | 1st BCA Congress, London | C33 King's Gambit Accepted |
| 50. J Mortimer vs W Bayliss |
| 1-0 | 35 | 1885 | Ruskin Prize t | C00 French Defense |
Kibitzing
