In 1936, at the invitation of the local government, he conducted an archaeological and historical survey of
Kotah, and made many discoveries there, including the excavation of many old forts and temples; the most important of his discoveries from this expedition were three stone pillars dated to the year 295 of the
Vikrama Era (AD 238), the second-oldest Vikrama inscriptions known. From 1951 to 1955 he led another excavation at
Kumhrar, under the auspices of the Jayaswal Institute; his discoveries there confirmed the theories of
David Brainard Spooner that the site, which Altekar described as "probably the earliest huge stone-pillared structure to be built by Indian architects", was a relic of the
Maurya Empire. On display at the
Patna Museum is a casket excavated by Altekar at a Buddhist monastery near
Vaishali in 1958, said to contain the ashes of the
Buddha. ==Study of the history of education in India==