"The private Ship letter Stamps of the Word", part 1 - The Caribbean (S. Ringstrom & H. E. Probe), part 2 - Australia - Europe - South America (S. Ringstrom & H. E. Probe), part 3 - The Suez Canal company (Jean Boulad d'Humieres, S. Ringstrom & H. E probe) as well part IV "The letter and Parcel Stamps of the Finnish Shipping company (G. W. Connell), scarce alignment in excellent condition, all hardcover edition.