A short biographical essay on Flora Jane Sinclair Moreland from The Texas Women's Hall of Fame by Sinclair Moreland, Biographical Press, Austin, 1917. Sinclair Moreland was Flora's son. He probably wrote the book while he was serving as Texas State Archivist and Historian.  He resigned that position to offer his services to the YMCA during WWI. He died the year after the book was published in the terrible flu epidemic that followed the war. He was only 33.

Sinclair Moreland was laudably effusive about his mother but he sometimes got his facts wrong. He noted that his grandparents married in 1848, but the accepted date is 1849. He also made it seem that the family was related to the famous, titled Sinclairs he mentioned, but from my research, it seems the direct family line was primarily made up of farmers, not gentry. He also repeats the old family story that Jessie Black was related to the famous explorer David Livingston but that also does not appear to be true. Jessie's husband, John Sinclair was 1C2R of Annie Sinclair Munro. John Sinclair and Ann McKillop were his grandparents and her great great grandparents. Annie Sinclair Munro's mother, Catherine Livingston was supposedly a cousin of David Livingston, but the connection was through Catherine's mother not her Sinclair father. There may be another connection which I've not yet found that would validate the family claim.