sleeve

ジョン・レノンがエリザベス女王へ書いた手紙が見つかりました。

Man finds John Lennon's letter to Queen tucked inside a record sleeve

A letter John Lennon wrote to Queen Elizabeth half a century ago explaining why he was returning a medal was found tucked in the sleeve of a record in a man's attic.
The man who found the letter had bought the record as part of a collection at a used-item sale for £10.
The letter is now valued at an estimated £60,000 ($72,000).
In the letter, the Beatles Legend outlines his reason for returning his MBE (Member of the British Empire) medal.
The Queen awards the medals to those who have left a notable mark in their fields. Lennon, along with the rest of the Beatles, received theirs in October 1965.
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The typed message reads: "Your Majesty, I am returning this MBE in protest against Britain's involvement in the Nigeria-Biafra thing, against our support of America in Vietnam and against Cold Turkey slipping down the charts."
It's signed "John Lennon of Bag".
"Bagism" is a term Lennon and his wife, Yoko Ono, coined during their peace campaign in the late 60s. Its objective was to break down stereotypes and eliminate prejudice.

http://edition.cnn.com/2016/10/28/living/john-lennon-queen-letter-trnd/index.html

今回取り上げるのは“sleeve”です。

『ジーニアス英和辞典』（第五版、大修館書店）では、お馴染みの「そで」以外に「（レコードの）ジャケット」という意味もありました。
ここでも“a record sleeve”とあり、発見された手紙はレコードのジャケットに挟まっていたことがわかります。

Oxford dictionaries.com.では“A protective paper or carboard cover for a record CD, or DVD.”と定義されていました。
もとはオランダ語の“covering”を表す“sloove”からきており、「なにかを覆う」要素を含んでいることがわかります。(flyingbird)