Magic lantern slide circa 1900.Victorian/Edwardian.Social History. John Walker, Alexander Walker and Charles Walker, known collectively as J & C Walker (active 1820-95), were engravers, draughtsmen and publishers working through the 19th century. They had several offices 47 Bernard St Russel Sq (from 1830 - 1836), 3 Burleigh St Strand (from 1837 to 1840), 9 Castle St Holborn (from 1841 to 1847) and 37 Castle St Holborn (from 1848 to 1875). Map Of Lindisfarne and farn