The malleus articulates to incus which connects to the stapes. The tympanic membrane sets the malleus, incus, and stapes into vibration. The ossicles are the malleus (hammer), incus (anvil), and the stapes (stirrup). The ossicles (malleus, incus and stapes) normally appear during the first half of fetal development. The middle ear contains three tiny bones known as the ossicles&colon; "malleus", "incus", and "stapes". The malleus is attached to the tympanic membrane and articulates with the incus. In the "Malleus Maleficarum" (1486), Asmodeus was considered the demon of lust. Clarke Garrett mentioned the quick decline and insignificance of the "Malleus Maleficarum". Scottorum malleus (Hammer of the Scots) and Pactum serva (Honour the vow). The malleus is a bone situated in the middle ear. The "head of the malleus" is the large protruding section, which attaches to the incus. The malleus rests on the membrane, and receives the vibration. Several sources attribute the discovery of the malleus to the anatomist and philosopher Alessandro Achillini. In 1538 the Spanish Inquisition cautioned its members not to believe everything the Malleus said. This pulls the manubrium of the malleus inwards and tightens it.