Maggs Bros (Bloomsbury)

Status: Still in existence (as far as we know, but not recently checked)
Address: 48 Bedford Square, Bloomsbury, WC1B 3DR (osm) (gmap) (bingmap) (streetview)
Phone number: 020 7493 7160
Website: Website
Twitter: @MaggsBros
Notes: Rare books and manuscripts. It also has a branch in Mayfair.