Take a look at Rattenbury's 'Packing Iron' - you should be able to secure a copy through your local Public Library - and you'll see that some were lined with fabric - some with leather - and many, many more with no lining whatsoever.
Holsters of the era were 'Mexican Loop', and 'Slim Jim' styles - not wet-fitted/vacuum-molded types seen in today's carry leather - and they were worn 'high' - not dropped down the thigh of the user.
Belts were often 'Money Belt' style - making the carrying of revolvers more comfortable.
There are some good modern makers of period leather - you'll find them in the 'back pages' on this forum and in the 'Leather' forum - so do your homework and look at 'Packing Iron', and you'll be on your way.
And if you're looking to build your impression - by all means, check this forum's 'back pages' and those of NCOWS, as well.
Good Luck!
Vaya,
Scouts Out!