Halphas (Demon)

The demon Halphas appears in the grimoires Book of Incantations, The Discoverie of Witchcraft, Pseudomonarchia Daemonum, and The Lesser Key of Solomon

From The Lesser Key of Solomon, Crowley/Mathers edition:

Halphas

The Thirty-eighth Spirit is Halphas, or Malthus (or Malthas). He is a Great Earl, and appeareth in the form of a Stock-Dove. He speaketh with a hoarse Voice. His Office is to build up Towers, and to furnish them with Ammunition and Weapons, and to send Men-of-War to places appointed. He ruleth over 26 Legions of Spirits, and his Seal is this, etc.

Timeline of related events

1500

1536

Publication of De praestigiis daemonum (lists this demon)

1600

1700

1800

1810

In this decade: Book of Incantations written (lists this demon)