His signature is sought after and not easy to find. He was killed commanding his artillery at Gettysburg.
Wikipedia has a great page on him. Civil War General Weed Kia Gettysburg Signed West Point Manual From Cadet Usma. The item "Civil War General Weeds Kia Gettysburg Signed West Point Manual When Cadet Usma" is in sale since Saturday, June 5, 2021. This item is in the category "Collectibles\Militaria\Civil War (1861-65)\Original Period Items\Documents". The seller is "megustabrass" and is located in Fairfax, Virginia. This item can be shipped to United States.