At some point I want to do some Siddhaṃ calligraphy of the dhāraṇī itself, but here at least you can see where the syllable stryi originates from.
Some other versions of stryi can be seen in this Flickr Gallery: Stone Siddhaṃ.

oṃ sarvatathāgatoṣṇīṣasitātapatre hūṃ phaṭ hūṃ mama hūṃ ni svāhāIf we break the sandhi and add dashes for compounds it reads:
oṃ sarva-tathāgataḥ
uṣṇīṣa-sita-ātapatre hūṃ phaṭ hūṃ mama hūṃ ni svāhā
Nigel made a generous donation for receiving this information - thanks again!
My latest post on Jayarava's Raves is some notes on a translation of the 100 Syllable Vajrasattva Mantra. I also offer some commentary on the words, though I plan to write a longer piece on this. I've also replaced the translation on the Visible Mantra Vajrasattva page.I've not also translated an exert from the commentary to the Karanīya Mettā Sutta which explains the circumstances in which the Buddha gave the discourse: How the Karanīya Mettā Sutta Came About.