Can anyone tell me where I can go to find out about what it was like to attend first grade in 1906 in Manhattan's 16th ward. I am writing about my grandmother for young people and want to be accurate. I also need information about the subway system and whether it went from Manhattan to downtown Brooklyn at that time. Thanks for any help you can give me. I don't live in NYC these days but visit, so research library material is not impossible for me to access.