My presentation was on Central Texas negro league history and included details and stories on Willie Wells, Biz Mackey, Waco's Katy Park, Jackie Robinson, and more. For people that are interested, here are the addresses to several sites in Austin that have connections to it's negro league history. I will add to this list as I find more information.
Willie Wells Mural and Home: Located in the neighborhood west of South Congress. The mural is in the alley behind the house.
1707 Newton Street
Downs Field: Still in use field that Willie Wells, Willie Mays, Ernie Banks, (probably) Jackie Robinson, and more played on.
2816 E 12th St, Austin, TX 78702
Dobbs Field: Original negro league baseball in Austin
I can not find the exact address but I do know it was off of Lake Travis Blvd close the dam. My best guess is around the intersection of Lake Travis Blvd and Redbud Trail.