But behind the wall, Iseult of the White Hands heard all these things; and Tristan continued: "Hasten, my friend, and come back quickly, or you will not see me again. Take forty days for your term, but come back with Iseult the Fair. And tell your sister nothing, or tell her that you seek some doctor. Take my fine ship, and two sails with you, one white, one black. And as you return, if you bring Iseult, hoist the white sail; but if you bring her not, the black. Now I have nothing more to say, but God guide you and bring you back safe."
With the first fair wind Kaherdin took the open, weighed anchor and hoisted sail, and ran with a light air and broke the seas. They bore rich merchandise with them, dyed silks of rare colours, enamel of Touraine and wines of Poitou, for by this ruse Kaherdin thought to reach Iseult. Eight days and nights they ran full sail to Cornwall.
Now a woman's wrath is a fearful thing, and all men fear it, for according to her love, so will her vengeance be; and their love and their hate come quickly, but their hate lives longer than their love; and they will make play with love, but not with hate. So Iseult of the White Hands, who had heard every word, and who had so loved Tristan, waited her vengeance upon what she loved most in the world. But she hid it all; and when the doors were open again she came to Tristan's bed and served him with food as a lover should, and spoke him gently and kissed him on the lips, and asked him if Kaherdin would soon return with one to cure him … but all day long she thought upon her vengeance.
And Kaherdin sailed and sailed till he dropped anchor in the haven of Tintagel. He landed and took with him a cloth of rare dye and a cup well chiselled and worked, and made a present of them to King Mark, and courteously begged of him his peace and safeguard that he might traffick in his land; and the King gave him his peace before all the men of his palace.
Then Kaherdin offered the Queen a buckle of fine gold; and "Queen," said he, "the gold is good."
Then taking from his finger Tristan's ring, he put it side by side with the jewel and said: "See, O Queen, the gold of the buckle is the finer gold; yet that ring also has its worth."
When Iseult saw what ring that was, her heart trembled and her colour changed, and fearing what might next be said she drew Kaherdin apart near a window, as if to see and bargain the better; and Kaherdin said to her, low down: "Lady, Tristan is wounded of a poisoned spear and is about to die. He sends you word that you alone can bring him comfort, and recalls to you the great sorrows that you bore together. Keep you the ring-it is yours."