The focus of the collection is the period in Dutch history when Holland was part of the French empire (1795-1815). It gives a quite complete survey of the newsprints and broadsides that were made in those years. Except these there are historical prints from other periods, amongst others some interesting satirical prints from the sixteenth century. The collection also contains various charactatures of Napoleon.

In a letter, dated 3 April 1935, De Jonge writes the following about his collection:

"Een verzameling historieprenten, pamfletten en bijbehorende boekjes, almanakken enz., in hoofdzaak betrekking hebbende op de patriottentijd in het begin der Bataafse Republiek, doch ook op voorafgaande en latere perioden, alsmede diverse spotprenten op Napoleon" [ A collection consisting of historical prints, pamphlets and accompanying books, almanacs, etc. which mainly deal with the age of the patriots at the start of the Dutch Republic, but also with earlier and later historical periods. The collection also contains various charicatures of Napoleon ]