Permissions... well, good news, bad news. According to the copyright office website:
Therefore, the U. S. copyright in any work published or copyrighted prior to January 1, 1923, has expired by operation of law, and the work has permanently fallen into the public domain in the United States. For example, on January 1, 1997, copyrights in works first published or copyrighted before January 1, 1922, have expired; on January 1, 1998, copyrights in works first published or copyrighted before January 1, 1923, have expired. Unless the copyright law is changed again, no works under protection on January 1, 1999 will fall into the public domain in the United States until January 1, 2019.Which means that two of the poems I needed to quote from are public domain.
The third, unfortunately, isn't... and the request originally went to the wrong people. So I've just re-sent it to the right people. Keep your fingers crossed for me.