Passage: Aside from the years of World War I, Grenfell and Hunt devoted their lives to work on the material from Oxyrhynchus. For ten years, from 1896 to 1906, every winter, when the Egyptian climate was mild, Grenfell and Hunt supervised hundreds of Egyptian workers, excavating the rubbish mounds, digging up tightly packed layers of papyrus mixed with earth. The finds were sifted, partially cleaned and then shipped to Grenfell and Hunt's base at Oxford. During the summer, Grenfell and Hunt cleaned, sorted, translated and compared the year's haul, assembling complete texts from dozens of fragments and extracts. In 1898, they published the first volume of their finds. They worked closely together, each revising what the other wrote, and publishing the result jointly. In 1926, however, Grenfell died, leaving Hunt to continue the work with other collaborators until his own death in 1934. Meanwhile, Italian excavators had returned to the site: their work, from 1910 to 1934, brought to light many further papyri, including additional pieces of papyrus rolls of which parts had already been discovered by Grenfell and Hunt.

Question: What did Grenfell and Hunt revise?
what the other wrote