Accession number: 86.200.576; Attribution to Jackson based on the photonegative's inclusion in the History Colorado William Henry Jackson Collection.; History Colorado.; Condition: spotted, discolored.; Formerly Jackson 2600.; Hand-lettered title on negative.; Number: "2600" etched on negative.; Number: "4435" etched on and scratched out on negative.; Number: "4435" hand lettered on negative.; Title on photonegative envelope reads: "Unaweep Canyon near Grand Junction."; R7201005500