Adverb of prior

[Brainless]

While writing a publication, I wanted to put 'priorly' thinking this sounds weird.
Then when it was highlighted as a mistake, and after further searching on the internet, I realized that, indeed, this word was weird and actually non existent.
I had to change my sentence and put "previously", yet I would love to know what is the adverb of 'prior'. If there is none, why is that?

Thank you

[jlinger]

Unfortunately, "priorly" is a word.
I agree with you however: I would not use it.

[nicoseb]

Priorly is a word? really?
Would you have any reference of this? I looked in a few dictionary without any luck! :s

Thanks for your reply though!