This article provides a bibliographical description of the content of eighteen manuscript volumes acquired by the Leiden University library, directly from Yemen, in the course of 2000. They contain a great variety of subjects, ranging from language to literature, history, religion and Islamic law. They date from 1042 (1632) to 1359 (1941), but most date from the 14th/20th century. Together, they give an impression of traditional Yemeni scholarship and book culture. An attempt is made to analyze the Ihmāl marks, a feature that has survived particularly in Yemeni manuscripts, and which occurs in many of the manuscripts described here.