http://www.pedigreedatabase.com/dog.html?id=911857Got this one on my yard right now and it goes back to the old performance line brindle American bulldogs off Leclerc but I assume you’re talking about the old school southern brindle bulldogs of early days pre-American bulldog history. I really don't know if the old timers and "myths" are actual truths especially since I don't live in those southern states (Georgia, Alabama, Mississippi, etc.) but I'd like to hear about any stories myself concerning the type you’re researching. Whether factual or not it makes for interesting reading.
Here's another one of the brindle american bulldogs I got on the yard coming off similar stock
http://www.pedigreedatabase.com/dog.html?id=1047244I think most here think brindle bulldog and post pits. I've had my share of those too over the years and consider them bulldogs in every sense of the term as well.