| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. F Alexander vs G Thomas |
 | 0-1 | 44 | 1919 | City of London CC-ch | D52 Queen's Gambit Declined |
| 52. G Thomas vs J Macalister |
| 1-0 | 36 | 1920 | Bromley | B01 Scandinavian |
| 53. G Thomas vs R Scott |
 | 1-0 | 54 | 1920 | Bromley | B18 Caro-Kann, Classical |
| 54. L Dewing vs G Thomas |
| 0-1 | 29 | 1920 | Bromley | C71 Ruy Lopez |
| 55. G Thomas vs A Sollas |
| 1-0 | 23 | 1920 | Bromley | B12 Caro-Kann Defense |
| 56. G Thomas vs R Gaudin |
| 1-0 | 30 | 1920 | Bromley | C67 Ruy Lopez |
| 57. F Brown vs G Thomas |
| 0-1 | 49 | 1920 | Bromley | C68 Ruy Lopez, Exchange |
| 58. M Marchand vs G Thomas |
| ½-½ | 29 | 1920 | Bromley | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 59. G Thomas vs J Blake |
| 1-0 | 37 | 1920 | British Championship | D37 Queen's Gambit Declined |
| 60. G Thomas vs R Scott |
| 1-0 | 41 | 1920 | British Championship | B18 Caro-Kann, Classical |
| 61. F Wenman vs G Thomas |
| 0-1 | 31 | 1920 | British Championship | A46 Queen's Pawn Game |
| 62. G Thomas vs G Wainwright |
| ½-½ | 44 | 1920 | British Championship | C77 Ruy Lopez |
| 63. G Thomas vs A J Mackenzie |
| 1-0 | 34 | 1920 | British Championship | C77 Ruy Lopez |
| 64. H Jacobs vs G Thomas |
| ½-½ | 19 | 1920 | British Championship | A02 Bird's Opening |
| 65. G Thomas vs S F Smith |
| 1-0 | 20 | 1920 | British Championship | C14 French, Classical |
| 66. R Michell vs G Thomas |
| 1-0 | 49 | 1920 | British Championship | C84 Ruy Lopez, Closed |
| 67. R Michell vs G Thomas |
| 1-0 | 32 | 1921 | British Championship | C42 Petrov Defense |
| 68. G Thomas vs H Stephenson |
| 1-0 | 39 | 1921 | British Championship | B12 Caro-Kann Defense |
| 69. P Sergeant vs G Thomas |
| 0-1 | 57 | 1921 | British Championship | A53 Old Indian |
| 70. G Thomas vs G Wainwright |
| 0-1 | 43 | 1921 | British Championship | C78 Ruy Lopez |
| 71. Yates vs G Thomas |
| 0-1 | 32 | 1921 | British Championship | C84 Ruy Lopez, Closed |
| 72. G Thomas vs J O'Hanlon |
| 1-0 | 21 | 1921 | British Championship | C66 Ruy Lopez |
| 73. H Saunders vs G Thomas |
| 0-1 | 49 | 1921 | British Championship | D51 Queen's Gambit Declined |
| 74. G Thomas vs H Jacobs |
| 1-0 | 59 | 1921 | British Championship | B01 Scandinavian |
| 75. B Siegheim vs G Thomas |
| 1-0 | 43 | 1921 | British Championship | A43 Old Benoni |
Kibitzing
