Browse All : Medium%3A+Black+chalk%2C+heightened+with+white+chalk%2C+on+tan+wove+paper+with+blue+fibers%2C+laid+down+on+cream+wove+cardRemarks%3A+Donor%3A+Alsdorf+Funds+Misc.+%28to+be+reimbursed+from+Fox+Fund%29Acc.+to+guidesheet%2C+there+is+some+question+re%3A+authenticity+of+signature+%28%22probably+by+his+daughter%22%29 by The+Art+Institute+of+Chicago from 1610