The 5 page PDF booklet includes two charts, for both front and back, as well as instructions for the blackwork and the Scotch Stitch border.
Stella by Starlight PDF Pattern Here.
Tutorial available - How to Make a Biscornu
The pattern above uses Weeks Dye Works threads in 1311 Taffeta on 28 count evenweave linen. The scotch stitch border requires even weave linen in order to work, but if you only have Aida, then you can replace the scotch stitch with a Rhodes stitch. This smaller biscornu is perfect for a scissor fob, door ornament, lavender sachet, etc. The patterns could also be used to create a needle case or Christmas ornament (especially as any dark color will look wonderful, even white on black linen is especially pretty).
Have fun with it,
Caroline