| Texts of the Cave Inscriptions at Handagala Vihara | Nicholas | Ceylon Historical Journal, The | 1953 | 2 | 3 & 4 | 221 - 224 | General |
| Thailand's Gift to Sri Lanka: the Establishment of the Siam Nikaya | Devaraja | Daily News | 14 May 2003 | N/A | N/A | N/A | Religion |
| Thalangama: Wetlands at our Doorstep | | Siyoth | 2007 | 2 | 1 | 26 - 34 | Birds |
| Than Nana Nana - Songs & History of the Plantation Labour | Velupillai | Times of Ceylon Annual | 1962 | N/A | N/A | N/A | General |
| That Buffalo - He's So Neglected | Cockrill | Loris | 1980 | XV | 3 | 138 - 140 | General |
| Theatre For the Folks | Peiris | Tourists' Ceylon | 1969 | 3 | 1 | 18 - 23 | General |
| Then and Now | Ludovici | Journal of the D.B.U. | 1989 | LXIII | 1 - 4 | 3 - 10 | General |
| Theory of the King's Ownership of Land in Ancient Ceylon, The | Siriweera | Ceylon Journal of Historical & Social Studies, The | 1971 | 1 (New Series) | 1 | 48 - 61 | History |
| There is much Simple Happiness to be had at Hambantota | Raffel | Loris | 1949 | V | 3 | 105 - 108 | General |
| There Were No Cloud Damsels & Lightning Princesses in Sinhala Paintings | Wijesekera | Samskrti | 1984 | 18 | 1 | 9 - 16 | General |
| Things I Have Seen & Heard - 2 | Wickwar | Loris | 1949 | V | 3 | 109 - 113 | General |
| Things Swiss & Ceylonese | G | Journal of the D.B.U. | 1936 | XXV | 3 | 92 - 97 | General |
| Third Mid-Winter Waterfowl (Duck) Count in Sri Lanka, The - January1986 | Hoffmann | Loris | 1986 | XVII | 4 | 142 - 144 | General |
| Third Supplementary Paper on The Monumental Remains of the Dutch East India Company of Ceylon | De Vos | Journal of the Royal Asiatic Society | 1905 | XVIII | 56 | 393 - 396 | History |
| This Rich Mud - Ratnapura, City of Gems | Wijetunga | Ceylon Observer Pictorial | 1966 | N/A | N/A | N/A | General |
| Threat to our Environment | Jaya Raj | Loris | 1980 | XV | 3 | 173 - 174 | General |
| Three Chola Invasions of Ceylon Not Recorded in the Mahavamsa | Paranavitana | Journal of the Royal Asiatic Society | 1929 | XXXI | 82 | 384 - 387 | History |
| Three New Cyprinoids, A New Catfish & Variations Among Some Cyprinoids & an Anabantoid of Ceylon | Deraniyagala | Spolia Zeylanica | 1958 | 28 | 2 | 129 - 138 | General |
| Three New Species of Montane Crabs from the Central Mountains of Sri Lanka | Bahir | Journal of South Asian Natural History | 1998 | 3 | 2 | 197 - 212 | General |
| Three Peaceful Days in the Jungle | Poulier | Loris | 1979 | XV | 1 | 33 - 34 | General |
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