Morley's particular passion was the study of the Maya calendar and its related inscriptions, and in this respect, he made useful expositions that have withstood later scrutiny. His talent was not so much to make innovations, but rather to publicise and explain the workings of the various systems. He was particularly proficient at recovering calendar dates from well-worn and weathered inscriptions, owing to his great familiarity with the various glyphic styles of the "tzolk'in", "haab and Long Count elements. Yet in his focus on calendric details, he would often overlook or even neglect the documentation of other non-calendric aspects of the Maya script; the comprehensiveness of some of his publications suffered much as a result. Some leading figures from a later generation of Mayanists would come to regard his publications as being inferior in detail and scope to that of his predecessors, such as Teoberto Maler and Alfred Maudslay — poorer quality reproductions, omitted texts, sometimes inaccurate drawings.