Are these three sentences worded in the proper way?

Soon thereafter, the eight ruling matron mothers of Menzoberranzan assembled together and Zeerith formally withdrew House Xorlarrin from the city. However, following Lolth and Quenthel’s demand, Zeerith promised that Q'Xorlarrin would be a close ally of Menzoberranzan, pay the city a tithe in the form of arms, and serve under the command of the Baenres in times of war. Once Zeerith departed, the ruling Houses that were below the Xorlarrins in rank ascended to their new positions, and Quenthel declared that House Do'Urden would be reconstituted as the Eighth House.