An ox horn seal carved with images of 'The Four Treasures of Scholar Objects'Qing dynastywith a fitted box,4.7cm highProvenance: Provenance:K. Y. Fine Art, Hong KongExhibited and Published:Exhibition of Scholar's Objects in China through the Ages, K. Y. Fine Art, Hong Kong, 3-12 Apr 2014, 2017 reprint, p.46, no.43清 牛角雕「文人四藝」印 及盒傳承：香港繼遠美術展覽及錄著：《中國歷代文玩展》，繼遠美術，香港，2014年4月3日至12日，2017年重印，頁46，展品43號Compare with a group of similarly made ox-horn seals, one with seal face also carved with pictorial motif and the top with a character to indicate the correct orientation of the seal face, seeRare Treasure in Shanxi Museum, Shanxi, 2005, no.330.與此形制十分相似的牛角章，山西博物院可見一套三枚，其中也有以圖案為印文，皆在印章頂刻有「上」字，以示印文上下。見《山西博物院珍粹》，山西人民出版社，2005年，編號330。