http://www.imagesonline.bl.uk/britishlibrary/

Update: http://cadensa.bl.uk/uhtbin/cgisirsi/x/x/0/49/%20;%20charset=UTF-8

This should work, if it doesn’t try the British Library Catalogues and Collections page:

https://www.bl.uk/catalogues-and-collections

An incredible resource, so much to see and so much History.