I don't know if an actual marker exists for Pinky or if the information provided on findagrave.com is from family sources. I believe Sandra Smith told me once that there is no marker, but I will have to check my emails (when I can find the time) to be sure.
The 1900 census has Jan 1900 for Zera's birth, but states she is four months, which would have made her month of birth February. The census was enumerated on June 23, 1900, which is also the date of Pinky's death.
None at this time.
Sandra Presley Smith, great niece to Zera Castellaw
heritagequestonline.com - Haywood County, TN 1900 US Federal Census (image)
findagrave.com - birth, death and cemetery information