As I discuss in this question, by far the most popular school of Hindu philosophy is the Vedanta school. But there are five other Astika or orthodox schools of Hindu philosophy: Purva Mimamsa, Samkhya, Yoga, Vaisheshika, and Nyaya. My question is about Vaisheshika, according to which atoms are the cause of the Universe. The defining text of the Vaikeshika school is the Vaisheshika Sutras, composed by the sage Kanada Kashyapa.
My question is, what is the oldest surviving commentary on the Vaisheshika Sutras? So far I've only come across one commentary on the Vaisheshika Sutras, at least in English: Shankara Mishra's Upaskara, which was composed in the 15th century or later and which you can read here. Are there any older commentaries?
By the way, apart from the Vaisheshika Sutras themselves, the two oldest surviving texts of the Vaisheshika school are Prashastapada's Padartha Dharma Sangraha, which I uploaded here, and Chandramati's Dashapadartha Shastra, which you can read here. But neither of them are actual commentaries on the Vaisheshika Sutras; instead they're independent expositions of the views of the Vaiseshika school. So what is the oldest surviving verse-by-verse commentary on the Vaisheshika Sutras?