《宋史·列传·卷一百六十九》
曹彦约为澧州知州，还没上任，薛叔似为京湖宣抚使，就召用曹彦约为主管宣抚使司机宜文字。
知澧州，未上，薛叔似宣抚京湖，辟主管机宜文字。
Cao Yan-yue was appointed as Lizhou Prefect. Before he assumed office, Xue Shusi, the Pacification Commissioner of Jinghu, recruited him to take the acting post of Administrative Staff Member in the Office of Pacification.