Booksellers’ Row, n. — Green’s Dictionary of Slang

Booksellers’ Row n.

[a deliberate euph. since the ‘books’ sold in Holywell Street, before it was knocked down for the Aldwych development, were strictly pornographic]

Holywell Street, London, WC.

1864, 1867, 1870		Hotten Sl. Dict. 216: The notorious Holywell Street is now called by its denizens ‘Bookseller’s Row’.
1885		Bulletin (Sydney) 15 Aug. 24/2: I saw the Rev. Mr. Baber of All Saints’, Petersham [...] looking into a shop window – (no, not in ‘Booksellers’ Row’) – at the end of Cheapside.