In the past few years, many philosophers have been getting excited about a new (or rather rediscovered) theory of consciousness that has become known as ‘Russellian monism’ (I have a video on this a couple of posts ago). I’m co-organising this amazing conference on the topic. More details here: https://philosophy.ceu.edu/RM 
Russellian Monism Conference
Conscience and Consciousness 
You may be interested in these two pieces “what I did wrote”. They’re mainly introductory in nature; though they may still be of interest. They touch on Russell’s monism.
http://paulaustinmurphypam.blogspot.co.uk/2016/01/bertrand-russells-ontic-structural.html
http://paulaustinmurphypam.blogspot.co.uk/2016/01/bertrand-russells-ontic-structural_7.html