Deletion of Niagara Public School (2nd nomination)

Comment: I added two decent book sources that mention it in terms of its historic value. I also found another ref for Janet Carnochan, the first principal and added that. (Note that in doing so, I spotted and removed some copyvio https://books.google.ca/books?id=FLa2vCIkljIC&pg=PA281&dq=%22NIAGARA+PUBLIC+SCHOOL%22&hl=en&sa=X&ved=0ahUKEwiS86S_jr3NAhXB7YMKHcAyCqUQ6AEIWDAJ#v=onepage&q=%22NIAGARA%20PUBLIC%20SCHOOL%22&f=false that was added in March as it perfectly matches the "come, Bright Improvement" ref). All in all, there are decent sources for something this old, which together establish notability. There does seem to be a bit of  and '''possible COPYVIO''', but that's not a reason to delete an interesting and notable article, but rather a reason for cleanup. I like the painting as a reference-- it's a clear and notable historical reference to the school in visual form
Stance: keep
Cited policy: Wikipedia:No original research (WP:OR)