Hi! I was just wondering whether the original Order of the Phoenix would have been aware of the Death Eater's Dark Marks, and so been aware that they were a source of communication between Voldemort and his followers? In particular I would like to know whether the Marauders and Lily were aware of them.

I know there was a passage in GOF which made it seem like Sirius didn't know about them, but I was always under the impression that they would have done.

Also do you think that I could put down Sirius' lack of knowledge down to a momentary memory lapse? Or perhaps say that he didn't want to alert Harry to the fact that Snape was a Death Eater?

I would really like some help with this as it would make my life a lot easier if Sirius did indeed know about the Dark Marks.

Thanks in advance!