to London, bearing 6d. dull purple with light small part cancellation, H1 and London Paid c.d.s. in red towards left; clean and attractive. Photo" /> cover 1873 (14 July) envelope<I> "via Halifax"</I> to London, bearing 6d. dull purple with light small part cancellation, H1 and London Paid c.d.s. in red towards left; clean and attractive. Photo | Christie's