De Klerk is his name

On the back of the cupboard is the name de Klerk and a M.
So this must be the last name of the user "de Klerk".

There was a clue on the bedpans as well.
There was K.P.M. on them .
Which is short for Koninklijke Paketvaart Maatschappij.

The Koninklijke Paketvaart-Maatschappij (KPM) was a Dutch shipping company, having its registered office in Amsterdam but with operational headquarters in Batavia, which existed between 1891 and 1966 mainly for maintaining shipping connections in and from the Dutch East Indies.

The KPM was established in Amsterdam on 4 September 1888 by the Rotterdamsche Lloyd (RL) and the Stoomvaart Maatschappij Nederland (SMN). From 1916, the Dutch head office, together with that of a few other Amsterdam shipping companies, was located in the Scheepvaarthuis on the Prins Hendrikkade. The new company took over part of the ships of the Nederlandsch Indische Stoomvaart Maatschappij. After two years of preparation, the KPM started implementing the first timetable on January 1, 1891.

Overview map of sailing connections of the KPM
The company focused primarily on shipping connections for passengers and cargo between the islands of the Dutch East Indies, the so-called "inter-insular shipping". At the end of the nineteenth century, the usual term for this kind of regular services for the transport of passengers, mail and goods was 'package shipping', carried out with 'package ships', whereby the prefix 'package', in the sense of postal package, was written with one 'k'; later the general spelling became "package", "package shipping" and "package ships", but the name of the company remained unchanged.


From 1906, routes from the Indian archipelago to foreign countries were also set up, the so-called "outside lines". These were often given their own names so that they looked like independent companies, but they were under the management of the KPM. For example, in 1908 the Java-Australia Line (JAL) was introduced, in 1910 the Java-Siam Line (JSL) and in 1915 the Deli-Straits-China Line (DSCL)

So the search on google starts the easy way.
K.P.M. and de Klerk.
It results not in a person but in a ship.
We will tell you more about this ship  "de Klerk "because it is a ship with a lot of  history.
 And to remind you why we are researching this ship . 
A beautifull picture of the inside of a cabin on another ship with a wash stand.