Van Deventer worked as a private lawyer from 1885 to 1888.
In May 1888 he took a leave for Europe and travelled with his wife by steamboat Prinses Amalia from Batavia to the Netherlands.
Back in Europe he wrote a series of articles, called De Wagner-feesten te Bayreuth (the Wagner festivals in Bayreuth), which he visited for the newspaper "De Locomotief"; in this period Van Deventer was a permanent employee of this newspaper.
He returned to the Dutch Indies on 11 May 1889 by steamboat Sumatra.
He resumed his lawyers practice and also became commissioner of the limited liability company "Hȏtel du Pavillon".
In September 1892 he was appointed acting member of the Committee of Directors of the Nederlands-Indische Spoorweg Maatschappij (Dutch East Indian Railway Company).
In July 1893 Van Deventer was promoted to the military rank of first lieutenant at the Schutterij in Semarang.

He left for a second short stay in Europe in May 1894 and was, after his return, appointed member of the supervisory committee of the HBS in Semarang.
In the newspaper "Locomotief" he wrote an article called Samarangsche bazar – eigen hulp (Bazar of Samarang), in which he defended himself against accusations that the prospectus of this firm (Samarangsche bazar), made up by him, was not accurate.
He left the Dutch East Indies (permanently) in April 1897 by steamboat Koningin-Regentes; back in Europe he visited the Wagner festivals and wrote about "Wagneriana" in The Locomotief of 11 November and 16 December 1897.
In 1898 Van Deventer wrote several articles about the coronation celebrations in the Netherlands, where queen Wilhelmina was crowned, in the "Locomotief".
He also wrote a series of four articles, called "Het Wilhelmus als Nederlands Volkslied" (the Wilhelmus as the Dutch national anthem), for the Locomotief that year and gave in the Locomotief his perspective on the Zola trial.
Van Deventer worked as a private lawyer from 1885 to 1888. In May 1888 he took a leave for Europe and travelled with his wife by steamboat Prinses Amalia from Batavia to the Netherlands. Back in Europe he wrote a series of articles, called De Wagner-feesten te Bayreuth (the Wagner festivals in Bayreuth), which he visited for the newspaper "De Locomotief"; in this period Van Deventer was a permanent employee of this newspaper. He returned to the Dutch Indies on 11 May 1889 by steamboat Sumatra. He resumed his lawyers practice and also became commissioner of the limited liability company "Hȏtel du Pavillon". In September 1892 he was appointed acting member of the Committee of Directors of the Nederlands-Indische Spoorweg Maatschappij (Dutch East Indian Railway Company). In July 1893 Van Deventer was promoted to the military rank of first lieutenant at the Schutterij in Semarang.
He left for a second short stay in Europe in May 1894 and was, after his return, appointed member of the supervisory committee of the HBS in Semarang. In the newspaper "Locomotief" he wrote an article called Samarangsche bazar – eigen hulp (Bazar of Samarang), in which he defended himself against accusations that the prospectus of this firm (Samarangsche bazar), made up by him, was not accurate. He left the Dutch East Indies (permanently) in April 1897 by steamboat Koningin-Regentes; back in Europe he visited the Wagner festivals and wrote about "Wagneriana" in The Locomotief of 11 November and 16 December 1897. In 1898 Van Deventer wrote several articles about the coronation celebrations in the Netherlands, where queen Wilhelmina was crowned, in the "Locomotief". He also wrote a series of four articles, called "Het Wilhelmus als Nederlands Volkslied" (the Wilhelmus as the Dutch national anthem), for the Locomotief that year and gave in the Locomotief his perspective on the Zola trial.
Conrad Theodor van Deventer