This collection of works by Leonard Cyril Martin includes some of his most important writings. Silex Scintillans is a collection of religious poems that Martin wrote in the 17th century. Hermetical Physick is a treatise on spirituality and medicine that explores the connections between the physical and spiritual realms. Thalia Rediviva is a collection of satirical poems that skewer the literary and cultural trends of Martin's time. With additional translations and appendices, this edition is a fascinating glimpse into the work of a little-known but immensely talented writer. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.