Israel De Lieben and Abraham Alexander were among the signers of this certificate admitting Thomas Napier as a Prince of Jerusalem, one of the “Sublime Degrees” of the fraternal order of Freemasons.

Many Masonic symbols are drawn from the stone mason’s craft. The triangle symbolizes the Supreme Being; the compass signifies control of the passions and the square the need to square one’s actions by honesty and virtue. The urn on the left with burning incense signifies a pure heart, and on the right, the urn pierced with a sword the need to maintain virtue. Masons use the Hebrew dating system and some Hebrew letters. The ח (hey) in the center of the triangle stands for Heredom, a mythical mountain in Scotland.