I noticed that a flag allegedly associated with Fort Hindman (Arkansas Post) recently sold at auction. The description on the auction site reads:

Confederate Light Artillery (or Cavalry) Guidon - Captured at Fort Hindman A very rare swallowtail Confederate artillery guidon, quite large, with its original blue lanyard. It was originally discovered furled around its staff with its red painted tin "halberd head" finial - now missing - in the attic of Corp. James L. Sheehan, a former member of the 127th Illinois Volunteer Infantry. Captured and taken home by him as a battlefield trophy from Fort Hindman, Arkansas (Arkansas Post on the Mississippi River during Grant's siege of Vicksburg in January 1863). This flag is very similar to the guidon of "Hill's Cavalry" (7th Tennessee Cavalry), captured at Island No. 10 in April 1862.

Authentication: Letters of authenticity and research from renowned Civil War flag expert and author Howard Madaus.

Provenance: Captured by Corp. Sheehan, 127th Illinois Volunteers, acquired by Daniel Potochniak of Hanover Park, Illinois from a descendant of 127th Illinois Volunteers; Crow Art Partnership Collection (Dallas, Texas)

Does anyone know more about this flag?