Brahmi
Support for this idea of pre-Ashokan development has been given very recently by the discovery of sherds at Anuradhapura in Sri Lanka, inscribed with small numbers of characters which seem to be Brāhmī. These sherds have been dated, by both Carbon 14 and Thermo-luminescence dating, to pre-Ashokan times, perhaps as much as two centuries before Ashoka.Greek legend: ΒΑΣΙΛΕΩΣ / ΑΓΑΘΟΚΛΕΟΥΣ (Basileōs Agathokleous, "of King Agathocles") Brahmi legend:𑀭𑀚𑀦𑁂 / 𑀅𑀕𑀣𑀼𑀼𑀓𑁆𑀮𑁂𑀬𑁂𑀲 (Rajane Agathukleyesa, "King Agathocles").
I have devoted much space and discussion to the role of the Mongol ʼPhags-pa alphabet in the origin of the Korean alphabet, but it should be clear to any reader that in the total picture, that role was quite limited. The origin of the Korean alphabet is, in fact, not a simple matter at all. Those who say it is "based" in ʼPhags-pa are partly right; those who say it is "based" on abstract drawings of articulatory organs are partly right.... Nothing would disturb me more, after this study is published, than to discover in a work on the history of writing a statement like the following: "According to recent investigations, the Korean alphabet was derived from the Mongol ʼPhags-pa script" ... ʼPhags-pa contributed none of the things that make this script perhaps the most remarkable in the world.