How do you get past the gatekeeper in elder scrolls IV Oblivion shivering isles

there are a couple of ways. at midnight, when whats-her-face goes to him and cries, you can pick up her hankercheif with her tears and use it as poison, and it works VERY well. or, your can find something Ice Veins and he'll make bone arrows for you if you do what he says and he'll help you defeat him. or, you could just go straight in and kill the gatekeeper with no strings atatched.hope this helped!