1684, and married on February llth, 1714 Leendertje Crane. He 

 was a surveyor by profession. One of their children was Martinus, 

 born March 31st, 1718 at Nijmegen (Cf. Plate II). He too was a sur- 

 veyor and moreover a municipal official of Nijmegen. On April 12th, 

 1750 he was married to Gijsberta Swinnas. From this marriage 3 

 sons, Willem, Leonardus and Frederik, were born. 



Frederik was the grandfather of Professor Beijerinck. He was 

 born at Nijmegen in 1766, and afterwards occupied the important 

 post of chief engineer of the Department of Buildings and Roads, 

 being entrusted with the survey of the rivers Rhine and Waal, as far 

 as they ran in Gelderland. For this purpose he lived alternately at Nij- 

 megen and Arnhem. The government acknowledged his merits by 

 knighting him in the order of "de Nederlandsche Leeuw". A portrait 

 of Frederik showing an undeniable resemblance to Professor Beije- 

 rinck is in the possession of the family, and is reproduced in Plate IL 

 Frederik was married twice. Firstly to Elisabeth Reijnen, from 

 which marriage issued : 



1) Martinus 1803-1879. 



2) Derk, father of Prof. Beijerinck 1805-1879. 



After the death of his first wife he married Jacomina Crijnen, who 

 gave birth to two more sons : 



1 ) Leonard Willem ' ) . 



2) Willem Cornelis. 



Frederik Beijerinck died in 1838. 



Although the straight line of descent is left here, it may be men- 

 tioned that Martinus, uncle of Professor Beijerinck, born in 1803, 

 had a much more successful career than Beijerinck's father whose 

 misfortunes are related in the following pages. Martinus Beijerinck 

 started his career as an engineer of the Department of Buildings and 

 Roads, and afterwards became a professor at the Polytechnical School 

 of Delft. 



We now arrive at Professor Beijerinck's parents. Derk Beije- 

 rinck, his father was born April 21st, 1805, baptized May 19th, 1805 

 at Nijmegen, and-died on January 22nd, 1879 at Eist, Over-Betuwe. 

 Derk (Cf. Plate II) was married on April 27th, 1843 to Jeannette 

 Henriëtte VAN Slogteren (born at Hoorn November 29th, 1811, 

 died April 16th, 1875 at Eist) (Cf. Plate II). She was the daughter of 

 the Rev. Johannes van Slogteren, linguïst and minister first at 

 Keppel and Doetinchem, and afterwards at Hoorn. From this mar- 

 riage were born : 



1) Frederik Leonard, born at Amsterdam, November 26th, 1844, 

 died at Almelo December 29th, 1883. 



1) This Leonard Willem had a rather remarkable career. As an equerry and at the 

 same time a great friend to Bernhard, Duke of Saxen- Weimar (Commander in Chief 

 of the Dutch Indian Army) he visited the Indies twice. On the second journey (in 

 1849) along the Isthmus of Suez the Duke and he were the guests of the Viceroy of 

 Egypt, Abbas Pasha. 



