someone at church gave me a old booklet, containing the Missa Orbis Factor (copied from the vatican edition-I know cuz I recognize the accompaniment,) as well as two other Mass settings by not-famous composers. These other two Masses are of particular interest because they are accompanied Latin for two voices, and not terrible. Not really common, but extremely useful in a church of limited resources as mine. The first of the two I did search around online and was listed in a couple places, but not actually available. The second, I could find nothing about the composer or availability. I'm sure they're both photocopies of something, I don't know what, but the booklet contains no other references.
My question comes up in that I would like to make these available for others, which is becoming easier and easier to do with resources such as cpdl.org. But as it is, having no information about the composers or when they were written or public domain (I think the first died in 1973,) I can't exactly do that.
And so, they will have to remain in my own personal archives, for my own secretive distribution at a to-be-determined necessary time in the future, when I only have two singers and need a nice Latin Mass setting!
(oh, and I'm not being terribly specific about exactly which pieces they are cuz I certainly wouldn't want the copyright police to come after me for having illegally copied music in my possession!) :-P