That's a terrific book, isn't it? The NY Correction History Society site may help you. I don't know whether it's still online - I'm writing this with restricted access to the web - but if it isn't, it's likely to be cached by archive.org. The Society site is an absolutely enormous site; you could spend weeks there.
I link to it here, along with a bunch of other prison resources for that time period, including additional writings by Thomas Mott Osborne:
Though I don't link to it, somebody put together a documentary a few years ago on Osborne's life that included period film of, I believe, Sing Sing. It may still be available on DVD, if you do a bit of Googling.
I spent several years researching this topic for a novel series (except for women prisoners, on which I have little information), so feel free to shoot me an e-mail if questions come up.
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Date: 2018-04-30 04:17 am (UTC)I link to it here, along with a bunch of other prison resources for that time period, including additional writings by Thomas Mott Osborne:
http://duskpeterson.com/toughs/bibliography/masculinity/index.htm#prisons
Though I don't link to it, somebody put together a documentary a few years ago on Osborne's life that included period film of, I believe, Sing Sing. It may still be available on DVD, if you do a bit of Googling.
I spent several years researching this topic for a novel series (except for women prisoners, on which I have little information), so feel free to shoot me an e-mail if questions come up.
http://duskpeterson.com/#contact