Dorset: a trout fly pattern from Favorite Flies and Their Histories (1892) by Mary Orvis Marbury

Hook: #12 - 14 sproat
Thread: brown
Tag: flat gold tinsel
Tail: brown hackle barbs
Body: olive floss
Hackle: brown hen
Wing: brown quill slips - mallard, pheasant, etc

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