Thanks for the picture psilocybescrewbens. Sheets often contain an image which is unrecognizable from one or two tabs, so I really appreciate being able to see the full thing.
As others have pointed out, you have taken a fair risk by posting such a large amount. Even if you have nothing to do with the distribution, the police might still think there is enough grounds to interrogate you and try to get you to "spill the beans" on your contact. With just those pictures alone though, I dont think there is really much grounds to charge you with anything, I mean those pictures could be normal paper containing no acid for all we know.
It might also be in your interests to keep anything that alludes to your location/identity a secret. Saying "North Tasmania" narrows down a location significantly from just "Tasmania". Also, using an email address that links directly to your isp would make it incredibly easy to identify you (note that im not sure if you are or not, just saying in general for the benefit of everyone). If you wanted to take extra steps in anonymity you could even connect thru an international proxy. Not that I want to encourage anyone to post content which could potentially put them in alot of trouble with the law, but if the intention behind the post was harm minimisation only, then thats understandable, and I think it would be in the posters best interests to minimise any possible harm caused to themsevles (and lets face it, going to prison would more than likely be a highly damaging experience, both physically and mentally).