Dear Artur,

I can’t off the top of my head recall someone presenting conclusive evidence on this question, probably because it does not exist.  (Though I have a nagging feeling that I did once see something like that.)  Thapar says it is “possible” that the Guptas could read the edicts [The Past Before Us, p. 341].  The first thing that comes to mind was the Girnar rock that bears the 14 Asokan rock inscriptions, Rudradāman’s famous inscription of 150 CE, and an inscription of Skandagupta.  The latter two (in Sanskrit, rather than Prakrit) relate to the renovation of Sudarśana lake, which is presented by Rudradāman as a Maurya public work begun under Candragupta Maurya and improved by Aśoka.  This seems an explicit effort here to claim the Mauryan mantle, which means that it must at least have been recognized that the rock’s old inscriptions were Mauryan --- though that does not mean that those later kings could *read* them.  There is no explicit reference in the later inscriptions to the content of the edicts.   The same can be said about the Allahabad Pillar Inscription (Asoka’s pillar edicts + “the Queen’s edict" + the Samudragupta inscription).  

I do not have access at the moment to Harananda Sastri’s 1936 The Asokan Rock at Girnar (Gaekwad’s Arch. Series, 2) — perhaps he had something to say about it.  Unless I am missing something, standard authorities like Salomon, Falk, et al. don’t seem to address this question directly.  

Anyone else know differently?

Tim