usually the gossip works in a way that you should receive each feed's messages in order. Essentially, your client will talk to a peer and say "I have everything

usually the gossip works in a way that you should receive each feed's messages in order. Essentially, your client will talk to a peer and say "I have everything up to message M from feed F, got news?" and then the peer will go "Oh, I'm caught up to message M!" and then your client will realize that N > M, and ask for the messages [M+1...N] in order. Of course, there are ways to mess this up if you try really hard. :P But to answer your question: Yes, you can read it. You won't be able to verify that it is part of an unbroken signature chain, but you will be able to verify that it was signed with the feed's private key.