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On the sound change *ld > nd in Tibetic


 This short note provides phonetic and phonological arguments in favour of the explanation of the sound change *ld > nd in Tibetic proposed by Sprigg (1972). It is argued that an alternative explanation by Gong (2016), resting on a novel interpretation of the consonant system of Common Central Tibetan, is not supported by the data and has no conceptual advantages.