De obsessione Dunelmi
... that the Anglo-Norman Latin text De obsessione Dunelmi is the first-known history of an English earldom?
... that the <a class="mw-disambig" href="./Anglo-Norman" id="mwFeg" rel="mw:WikiLink" title="Anglo-Norman">Anglo-Norman</a> <a href="./Medieval_Latin" id="mwFek" rel="mw:WikiLink" title="Medieval Latin">Latin</a> text <i id="mwFeo"><b id="mwFes"><a href="./De_obsessione_Dunelmi" id="mwFew" rel="mw:WikiLink" title="De obsessione Dunelmi">De obsessione Dunelmi</a></b></i> is the first-known history of an <a href="./Kingdom_of_England" id="mwFe0" rel="mw:WikiLink" title="Kingdom of England">English</a> <a class="mw-redirect" href="./Earldom" id="mwFe4" rel="mw:WikiLink" title="Earldom">earldom</a>?