ZEEBROEK-HOLLEMANS, Jany. "Langerock Henri", Le Dictionnaire des peintres belges du XIVe siècle à nos jours. La Renaissance du Livre, t. 2, 1994, p. 618.
<b>1869 - 1878 / Paris [F], Boulevard des Italiens, 29</b> Henri Charles, ° 29.1.1830; + 21.12.1915. Landscape painter. After studying at the academy in Ghent, he moved to France, operating as a portrait photographer initially in Lyon, Rue Lanterne, 1 in 1861-1864, then in Marseille, Place Saint-Ferréol, 10 in 1864-1869 before settling in Paris. French patent of 28.12.1865 for a "system of photography known as the Langerock system", a retouching process. Langerock painted in the forest of Fontainebleau in the style of the Barbizon school. He was also a photographer in Paris, first as a partner and then successor to Numa-Blanc at Boulevard des Italiens, 29 in about 1870 and where he styled himself "painter photographer". His work included a series of double-plate photographs documenting the ruins of Paris in 1871. Langerock moved his studio to Courbevoie [Hauts-de-Seine, F], Rue Saint-Denis, 207 in 1878 but seems to have abandoned photography soon afterwards. Described as a painter at this address in 1881 and again when back in Paris, Boulevard de Bonne-Nouvelle, 5 bis in 1885. Stays in Egypt (dates unspecified) and Brazil, 1886-1890. Exhibited regularly at the Paris Salon until 1901. Langerock’s oil paintings and watercolours were dispersed at auction in Paris on 19.4.1920.