In English, the spellings Vietnam, Viet-Nam, and Viet Nam have all been used. The 1954 edition of "Webster's New Collegiate Dictionary" gave both the unspaced and hyphenated forms; in response to a letter from a reader, the editors indicated that the spaced form Viet Nam was also acceptable, though they stated that because Anglophones did not know the meaning of the two words making up the name Vietnam, "it is not surprising" that there was a tendency to drop the space. In 1966, the U.S. government was known to use all three renderings, with the State Department preferring the hyphenated version. By 1981, the hyphenated form was regarded as "dated", according to Scottish writer Gilbert Adair, and he titled his book about depictions of the country in film using the unhyphenated and unspaced form "Vietnam".