Cahill from Favorite Flies and Their Histories by Mary Orvis Marbury

Hook: #6 straight eye
Thread: claret
Tag: gold tinsel
Tail: Golden Pheasant tippet
Rib: gold tinsel
Body: orange floss
Hackle: green saddle
Wings: Golden Pheasant tippet

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