Robert Lewis Tree Mixture The Robert Lewis Tree mixture is a fine Latakia mixture blended specifically for a long standing Robert Lewis's customer. Colonel Tree's capacity for tobacco was so great he sustained this as a completely private brand. He was the only customer for nearly 50 years until the end of the 20th Century when the Tree mixture was finally released for the general public to enjoy. The tree mixture is a broken flake produced from a cake of the very finest sweet Virginias and Latakia, which provides, a rich, cool burning smoke.