Thank you, Harry. Most of these are just instances where sandhi has not been implemented, or (in the case of Veda) where a text has been metrically restored. From a quick glance, though, a few do seem to be possible instances of aḥ + a > a a, and/or of e + a > a a. I will have to look more carefully.

Best wishes,
Martin

Den 2019-03-21 kl. 19:08, skrev Harry Spier:

I just did a search of GRETIL for ...a a.... ... and there are hundreds possibly thousands of occurances of this . Here is a small sample. Note the Brahmasutras and Mahabhasya with commentaries had hundreds but since I wasn't sure if sandhi had been broken in these for commentarial purposes I'm not including them in this following small sample: