We Went To The Zoo Today... The Golden Age of Zoo Postcards. Contains almost two hundred of the best postcards of their kind from the first half of the 20th century. These cards are often amusing, sometimes poignant, but always of interest. This book endeavours, and hopefully succeeds, to give these ‘silent snapshots’ the voice they deserve. It includes a ‘History of the Picture Postcard’ and helpful tips on how to date your own cards.