Zhang Jun (15th century) Poem in cursive script. Photo Sotheby's

signed Huating Zhang Jun, dated the fifteenth year of the Chenghua reign (1479), autumn, the twentieth day of the eighth lunar month, with a dedication, and three seals of the artist, xiao xing cha, tian guan da fu, hua ting zhang tian jun fu; ink on paper, hanging scroll; 147.9 by 47.6 cm. 58 1/4  by 18 3/4  in. Estimation 30,000 — 40,000 USD 

PROPERTY FROM AN OLD JAPANESE COLLECTION 

Exposition: Enjoying Chinese Paintings, Tokyo Shoto Museum of Art, June 9 to July 20, 1998, cat. #26
Spirit of Ink: The World of Chinese Paintings and Calligraphy, Kyoto National Museum, January 8 to February 20, 2011, cat. #51

Sotheby's. Fine ical Chinese Paintings & Calligraphy. New York | 19 sept. 2013 - http://www.sothebys.com