Bertha. Steel Engraving from Heath's Gallery of British Engravings £10.00 Quantity: at £10.00 each Add To Basket 1 in stock. 0 in your basket View Basket Checkout Steel Engraving called "Bertha."Size - 11.50cm x 9.00cm.Artist - H.Briggs.Engraved by F.Bacon.Date - 1846.Condition - Engraving is Clear. Foxing appearing all the way around the Outside, quite bad in Places.