Does anyone know where I can find a copy of the original Stellar Consensus Protocol SDF whitepaper dated on or before April 8, 2015? It is clear from the blog post that a whitepaper was published on or before this date.
However, the earliest version I can find is dated July, 14 2015 and the main one that seems to be in circulation is a draft dated February 26, 2016.
I'm curious if anyone can share the original dated on or before April 8, 2015? I'm doing research for a university class on how protocols evolved overtime.