To insure good eyesight in Devon

Fennel on Slapton Sands - Gwen and James Anderson [CC-BY-SA-2.0 (www.creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

"Fennel, rose, vervain, celandine and rue,
Do water make which will the sight renew."

Hewett 1900