Most scholars believe that Guido of Arezzo's Solfège musical notation system had its origins in a Latin hymn, but others suggest that it may have had Arabic origins instead. It has been argued that the Solfège syllables ("do, re, mi, fa, sol, la, ti") may have been derived from the syllables of an Arabic solmization system "Durr-i-Mufassal" ("Separated Pearls") ("dal, ra, mim, fa, sad, lam"). This was first proposed by Meninski in his "Thesaurus Linguarum Orientalum" (1680). However, there is no documentary evidence for this theory, and no Arabic musical manuscripts utilizing sequences from the Arabic alphabet are known to exist. Henry George Farmer believes that there is no firm evidence on the origins of the notation, and therefore the Arabian origin theory and the hymnal origin theories are equally credible.