| William Notman Studio Cloud negative No. 12, Montreal, QC 1871 Negative 20 x 25 cm McCord Stewart Museum Achat de l'Associated Screen News Ltd., I-68904.A LL/98287 (Nora Hague, 2 April 2020) [William Notman] Used to add clouds to a neg exposed to accent ground detail, with a correspondingly blank sky. This is #12 so he must have had at least 11 other cloud negs.
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