Complex sentence: In 1837 he was co-founder, and for many years editor of the journal "Waarheid in Liefde" (Truth and Love), and with Petrus Hofstede de Groot (1802-1886) was co-author of the "Encyclopaedia theologi Christiani".
Split into simpler sentences: In 1837 he was co-founder, and for many years editor of the journal "Waarheid in Liefde" (Truth and Love). With Petrus Hofstede de Groot (1802-1886) he was co-author of the "Encyclopaedia theologi Christiani".