https://archive.org/details/krl00394037/page/n120/mode/1up

The Lady’s Work Book, 1840, page 117.
No. LXI. Sort of Shell - Cast on 9 stitches for each pattern.
1st Round, P7, T, O.
2d Round, P6, T, P, O.
3d Round, P5, T, P2, O.
4th Round, P4, T, P3, O.
5th Round, P3, T, P4, O.
6th Round, P2, T, P5, O.
7th Round, P, T, P6, O.
8th Round, O, P7, T.

Modern instructions, modified to be worked flat with a garter frame.
No. 61. Sort of Shell.
CO 9 sts per repeat plus 6 edge sts (33 sts)
Rows 1-4: Knit across, turn.
Row 5: K3, [k7, k2tog, yo] x3, k3, turn.
Row 6: K3, [yo, p1, p2tog, p6] x3, k3 turn.
Row 7: K3, [k5, k2tog, k2, yo] x3, k3, turn.
Row 8: K3, [yo, p3, p2tog, p4] x3, k3, turn.
Row 9: K3, [k3, k2tog, k4, yo] x3, k3, turn.
Row 10: K3, [yo, p5, p2tog, p2] x3, k3, turn.
Row 11: K3, [k1, k2tog, k6, yo] x3, k3, turn.
Row 12: K3, [p2tog, p7, yo] x3, k3, turn.
Rows 12-28: Repeat Rows 5-12 x2.
Rows 29-32: Knit across, turn.
BO.