SIENESE SCHOOL, CIRCA 1600 | The Apostles in the garden of Gethsemane

Laid down on thin japan paper. Lower left corner made up. Part of the lower margin, in the centre, is torn and made up. A few nicks and tears around the edges of the sheet and staining around the edges. Ink stains at the right margin. Surface dirt. Red chalk and wash still remains strong despite the condition issues.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Though it is executed with confidence in a distinctive personal style, no convincing attribution has so far been suggested for this intriguing drawing.  The closest stylistic parallels would seem to be with artists originating from Siena, active circa 1600, such as Alessandro Casolani (1552-1606).