Dark Stone fly pattern from Favorite Flies and Their Histories (1892) by Mary Orvis Marbury

Hook: #6 sproat
Thread: claret
Tag: gold tinsel
Tail: three wild Tom turkey tail barbs, divided
Rib: gold oval tinsel
Body: dark brown seal fur, dubbed
Hackle: dark brown hen
Wings: wild Tom turkey tail feather slips
Head: claret thread

Head cement recipe:
Goop
Xylene (epoxy thinnner)

Instructions:
Fill a quart jar half full with Xylene
Squeeze a tube of Goop into the Xylene
Shake until the Goop is dissolved; add Xylene to desired consistency

Apply with a pin or needle dipped in the liquid

https://youtu.be/AJbvJUixaCs