bloodlines" bismark" can someone help

I have a dog out of mealer's lines that contain bismark's viper. Viper is in several pedigrees from other kennels. Does anyone no more about bismark's line of dog. I have heard they are game bred dogs from the old days from other people on the net. If anyone knows of these lines or someone does it would be of great help. I looking into having my current pet become the foundation of line in the future. I want to get as much knowledge as possible. I really want to know about tempermant and drive.
Shuffield and caldwell bloodlines as well if you are bored.