Can anyone tell me where to find information on "hello girls" and stenographers in 1865-1900?

Answer 1

I can't find anything on "Hello Girls" before WWI.
http://www.worldwar1.com/dbc/hello.htm

Here is a site with basics about early female telephone operators, if that helps
http://pbskids.org/wayback/tech1900/phone.html

Don't know about stenographers before 1900. Haven't found anything yet