Mark Twain passage of boat, was a measure on the sounding line. Twain is an archaic term for "two", as in "The veil of the temple was rent in twain." The riverboatman's cry was "mark twain" or, more fully, "by the mark twain", meaning "according to the mark [on the line], [the depth is] two [fathoms]", that is, "The water is deep and it is safe to pass." Twain said that his famous pen name was not entirely his invention. In "Life on the Mississippi", he wrote: Captain Isaiah Sellers was not of literary turn or capacity, but he used to jot
Old English eth is replaced by thorn). In contrast with Modern English orthography, that of Old English was reasonably regular, with a mostly predictable correspondence between letters and phonemes. There were not usually any silent letters—in the word "cniht", for example, both the and were pronounced, unlike the and in the modern "knight". The following table lists the Old English letters and digraphs together with the phonemes they represent, using the same notation as in the Phonology section above. Doubled consonants are geminated; the geminate fricatives /, and cannot be voiced. Old English literature, though more abundant than literature of the continent