Two rare souvenier / memory boxes

Two rare souvenier / memory boxes in book form with buckle- presumably made of silver; mid-19th century; inside are numerous loose pages with interesting contents; labeled, signed and partly provided with small beautiful works of art; a letter from 1852; numerous memorial pages from 1840 and amazing drawings which are partly signed; traces of use according to age; measurement: 15 x 9 cm and 14,5 x 9,5 cm