Before the Koren-Sacks Siddur (2009), there was the Authorised Daily Prayer Book first published in 1890 and used by Jews throughout the British Empire, while there was a British Empire. It was originally published under the authorization of Great Britain’s first Chief Rabbi, Rabbi Nathan Marcus Adler with a Hebrew liturgy based on Isaac Seligman Baer’s Seder Avodat Yisroel (1868). The translation by Rabbi Simeon Singer (1846-1906) was the most extensive English translation of the Siddur ever published, and for this reason most editions are simply referred colloquially as The Singer Siddur. The Standard Prayer Book, published by Bloch in 1915, was an American reprint of The Authorized Daily Prayer Book. . . .