Greenhood & Newbauer Northern Express, Weaverville, California. Printed three-line frank on 1860 cover to Gen. J.W. Denver in Sacramento City, with original 4-page enclosure datelined "Weaverville, May 28th, 60" regarding political matters, Very Fine, a very rare express marking, this cover sold for $200 in 1968 at John Fox sale of the "Denver Papers". Estimate  $1,500 - 2,000. $0 (Image)