Macintosh. Danino notes that "the 1500 km-long bed of the Sarasvati" was "rediscovered" in the 19th century. According to Danino, "most Indologists" were convinced in the 19th century that "the bed of the Ghaggar-Hakra was the relic of the Sarasvati." Recent archaeologists and geologists, such as Philip and Virdi (2006), K.S. Valdiya (2013) have identified the Sarasvati with Ghaggar. According to Gregory Possehl, "Linguistic, archaeological, and historical data show that the Sarasvati of the Vedas is the modern Ghaggar or Hakra." According to R.U.S. Prasad, "we [...] find a considerable body of opinions [sic] among the scholars, archaeologists and geologists, who hold that the Sarasvati originated in the Shivalik hills [...] and descended through Adi Badri, situated in the foothills of the Shivaliks, to the plains [...] and finally debouched herself into the Arabian sea at the Rann of Kutch." According to Valdiya, "it is plausible to conclude that once upon a time the Ghagghar was known as "Sarsutī"," which is "a corruption of "Sarasvati"," because "at Sirsā on the bank of the Ghagghar stands a fortress called "Sarsutī". Now in derelict condition, this fortress of antiquity celebrates and honours the river Sarsutī." Textual and historical objections Ashoke Mukherjee (2001), is critical of the attempts to identify the Rigvedic Sarasvati. Mukherjee notes that many historians and archaeologists, both Indian and foreign, concluded that the word "Sarasvati" (literally "being full of water") is not a noun, a specific "thing". However, Mukherjee believes that "Sarasvati" is initially used by the Rigvedic people as an adjective to the Indus as a large river and later evolved into a "noun". Mukherjee concludes that the Vedic poets had not seen the palaeo-Sarasvati, and that what they described in the Vedic verses refers to something else. He also suggests that in the post-Vedic and Puranic tradition the "disappearance" of Sarasvati, which to refers to "[going] under [the] ground in the sands", was created as a complementary myth to explain the visible non-existence of the river. Romila Thapar terms the identification controversial and dismisses it, noticing that the descriptions of Sarasvati flowing through the high mountains does not tally with Ghaggar's course and suggests that Sarasvati is Haraxvati of Afghanistan. Wilke and Moebus suggest that the identification is problematic since the Ghaggar-Hakra river was already dried up at the time of the composition of the Vedas, let alone the migration of the Vedic people into northern India.