Ka cika wannan jumla: Birnin ya zama mai muhimmanci sosai a lokacin da Tudor ya ci ƙasar Ireland kuma ana yawan kai wa birnin hari. A lokacin O'Doherty tawaye a 1608 da aka kai hari da Sir Cahir O'Doherty, Irish shugaban Inishowen, wanda
sun ƙone yawancin garin kuma sun kashe gwamnan George Paulet. Soja kuma ɗan siyasa Sir Henry Docwra ya yi ƙoƙari sosai don haɓaka garin, yana samun suna a matsayin "wanda ya kafa Derry"; amma an zarge shi da rashin iya hana harin O'Doherty, kuma ya koma Ingila.