I have been looking for public domain copies of several important keys. At this point, I don't think a key will be found inside the United States and I'm reaching out for some help.
If someone is close to a good public or university library, here's what I'm looking for:
Key to Latin Prose Composition, North and Hillard
Key to Greek Prose Composition, Arthur Sidgwick
Key to A First Greek Course, Sir William Smith