How to Construct a Waistcoat

I was going to write and in dept study for construction of both styles of waistcoat however I have found some amazing blogs and websites which I was going to use as a reference however they cover it beautiful with wonderful pictures covered the construction extremely well.

18th Century Waistcoat:-
http://lynnmcmasters.com/18thCwestcoat.html
http://thedreamstress.com/2011/09/18th-century-menswear-the-waistcoat/

19th Century/Modern Waistcoat:-
https://teainateacup.wordpress.com/tag/waistcoat-construction/
http://fabric8online.blogspot.co.uk/2012/11/making-waistcoat-and-adding-functional.html
Video refrences:-https://www.youtube.com/user/ny204193d/videos