Krekel (Mattie H. Hulett), b. of freethinking parents, Elkhart Indiana 13 April, 1840. Educated at Rockford, Illinois, in her 16th year became a teacher. Married Judge Krekel, after whose death, she devoted her services to the Freethought platform. Kropotkin (Petr Aleksyeevich) Prince, Russian anarchist, b. Moscow 9 Dec 1842. After studying at the Royal College of Pages he went to Siberia for five years to pursue geological researches. In '71 he went to Belgium and Switzerland and joined the International. Arrested in Russia, he was condemned to three years imprisonment, escaped '76 and came to England. In '79 he founded at Geneva, Le Révolté was expelled. Accused in France in '83 of complicity in the outrage at Lyons, he was condemned to five years imprisonment, but was released in '86, since which he has lived in England. A brother who translated Herbert Spencer's "Biology" into Russian, died in Siberia in the autumn of 1886. Laas (Ernst) German writer, b. Furstenwalde, 16 June, 1837. He has written three volumes on Idealism and Positivism, 1879-'84, and also on Kant's Place in the History of the Conflict between Faith and Science, Berlin, 1882. He was professor of philosophy at Strassburg, where he died 25 July, 1885. Labanca (Baldassarre), professor of moral philosophy in the University of Pisa, b. Agnone, 1829. He took part in the national movement of '48, and in '51 was imprisoned and afterwards expelled from Naples. He has written on progress in philosophy and also a study on primitive Christianity, dedicated to Giordano Bruno, the martyr of Freethought, '86. Lachatre (Maurice), French writer, b. Issoudun 1814, edits a "Library of Progress," in which has appeared his own History of the Inquisition, and History of the Popes, '83. Lacroix (Sigismund), the pen name of Sigismund Julien Adolph Krzyzanowski, b. Warsaw 26 May, 1845. His father was a refugee. He wrote with Yves Guyot The Social Doctrines of Christianity. In '74 he was elected a municipal councillor of Paris. In '77 he was sentenced to three months' imprisonment for calling Jesus "enfant adulterin" in Le Radical. In Feb. '81 he was elected president of the municipal council, and in '83 deputy to the French parliament. Laffitte (Pierre), French Positivist philosopher, b. 21 Feb. 1823 at Beguey (Gironde), became a disciple of Comte and one of his executors. He was professor of mathematics, but since the death of his master has given a weekly course of instruction in the former apartment of Comte. M. Laffitte has published discourses on The General History of Humanity, '59, and The Great Types of Humanity, '75-6. In '78 he founded La Revue Occidentale.