For a period of about two years Ricardo Studios of St Albans regularly visited the wartime Military Hospital at Napsbury Asylum at London Colney and took posed photographs of groups of patients in the wards, or in the grounds. These would have been purchased by patients to send off to family and friends. Virtually all the pictures were numbered and I have now collected together a large number of images, many of which can be enlarged to allow easy identification of the faces. Sufficient of the cards are dated and this allows approximate dates to be given to the other cards. If you can identify any of the many hundreds of faces - or have other examples of Ricardo cards (especially if they are dated) let me know and help make the dating more accurate.