The Spitzer Manuscript is the oldest surviving philosophical manuscript in Buddhist Sanskrit, and possibly the oldest Buddhist Sanskrit manuscript of any type related to Buddhism discovered so far. The manuscript was found in 1906 in the form of a pile of more than 1,000 palm leaf fragments in the Ming-oi, Kizil Caves, China during the third Turfan expedition headed by Albert Grünwedel. It is named after Moritz Spitzer, whose team first studied it in 1927–28. The calibrated age by Carbon-14 technique is 130 CE (80–230 CE).According to Indologist Eli Franco, palaeographical features suggest a date closer to 200–230 CE. The text is written in the Brahmi script (Kushana period) and some early Gupta script. The Spitzer Manuscript was found near the northern branch of the Central Asian Silk Road. It is unique in a number of ways. Unlike numerous Indian manuscripts whose copies survive as early translations in Tibet and China, no such translations of the treatises within the Spitzer Manuscript have been found so far. The manuscript fragments are actually copies of a collection of older Buddhist and Hindu treatises. Sections of Buddhist treatises constitute the largest part of the Spitzer Manuscript. They include verses on a number of Buddhist philosophies and a debate on the nature of Dukkha and the Four Noble Truths. The Hindu portions include treatises from the Nyaya-Vaiśeṣika, Tarkasatra (treatise on rhetoric and proper means to debate) and one of the earliest dateable table of content sequentially listing the parva (books) of the Mahabharata, along with numerals after each parva. This list does not include Anusasanaparvan and Virataparvan. Studies by the Indologist Dieter Schlingloff on these Spitzer Manuscript fragments suggest that more ancient versions of the Mahabharata were likely expanded and interpolated in the early centuries of the common era. According to Indologist and Sanskrit scholar John Brockington, known for his Mahabharata-related publications, the table of contents in the Spitzer Manuscript includes book names not found in later versions, and it is possible that the parvas existed but were with different titles.