The "Vayu Purana", according to the tradition and verses in other Puranas, contains 24,000 verses (shlokas). However, the surviving manuscripts have about 12,000 verses. The text was continuously revised over the centuries, and its extant manuscripts are very different. Some manuscripts have four "padas" (parts) with 112 chapters, and some two "khandas" with 111 chapters. Comparisons of the diverse manuscripts suggest that the following sections were slipped, in later centuries, into the more ancient "Vayu Purana": chapters on geography and temples-related travel guides known as "Mahatmya", two chapters on castes and individual ashramas, three chapters on Dharma and penances, eleven chapters on purity and Sanskara (rite of passage) and a chapter on hell in after-life.