And did Blake start this poem with a conjunction?

According to wikipedia: "The Proms, more formally known as The BBC Proms, or The Henry Wood Promenade Concerts presented by the BBC, is an eight-week summer season of daily orchestral classical music concerts and other events held annually, predominantly in the Royal Albert Hall in South Kensington, London. Founded in 1895, each season currently consists of over 70 concerts in the Albert Hall, a series of chamber concerts at Cadogan Hall, additional Proms in the Park events across the United Kingdom on the last night, and associated educational and children's events."