of a well-known translation may have contributed to the decline of Scottish Gaelic. Counterintuitively, access to schooling in Gaelic increased knowledge of English. In 1829 the Gaelic Schools Society reported that parents were unconcerned about their children learning Gaelic, but were anxious to have them taught English. The SSPCK also found Highlanders to have significant prejudice against Gaelic. T. M. Devine attributes this to an association between English and the prosperity of employment: the Highland economy relied greatly on seasonal migrant workers travelling outside the . In 1863, an observer sympathetic to Gaelic stated that "knowledge of English is indispensable to any poor islander who wishes to learn a trade or to earn his bread beyond the limits of his native Isle". Generally, rather than Gaelic speakers, it was Celtic societies in the cities and professors of Celtic from universities who sought to preserve the language. The Education (Scotland) Act 1872 provided universal education in Scotland, but completely ignored Gaelic in its plans. The mechanism for supporting Gaelic through the Education Codes issued by the Scottish Education Department were steadily used to overcome this omission, with many concessions in place by 1918. However, the members of Highland school boards tended to have anti-Gaelic attitudes and served as an obstacle to Gaelic education in the late 19th and early 20th century. Loss of life due to World War I and the 1919 sinking of the HMY combined with emigration to mean the 1910s saw unprecedented damage to the use of Scottish Gaelic, with a 46% fall in monolingual speakers and a 19% fall in bilingual speakers between the 1911 and 1921 Censuses. Michelle MacLeod of Aberdeen University, has said there was no other period with such a high fall in the number of monolingual Gaelic speakers: "Gaelic speakers became increasingly the exception from that point forward with bilingualism replacing monolingualism as the norm for Gaelic speakers." The Linguistic Survey of Scotland (1949–1997) surveyed both the dialect of the Scottish Gaelic language, and also mixed use of English and Gaelic across the Highlands and Islands. Defunct dialects Dialects of Lowland Gaelic have been defunct since the 18th century. Gaelic in the Eastern and Southern Scottish Highlands, although alive until the mid-20th century, is now largely defunct. Although modern Scottish Gaelic is dominated by the dialects of the Outer Hebrides and Isle of Skye, there remain some speakers of the Inner Hebridean dialects