How to make quill pens from bird feathers

GC QUILL Fountain Pen - Fine Nib with Ink Refill Converter, Fancy Pen Gift Set for Calligraphy Writing Journaling - MU-11

GC QUILL Calligraphy Pen Set - Feather Dip Pen,Dual Tip Calligraphy Fountain Pen, Stamp, Wax Candle, Pen Base, Ink Bottle, Ink Cartridges L1492

GC QUILL Fountain Pen Set – Fine Nib with 12 Ink Cartridges and Ink Refill Converter, Pen Gift Set for Writing Journaling Calligraphy– MU-12