His jewel is the Square & Compass with the Sun in the middle. The sun signifies that his position is on the lower level, to the right of the Worshipful Master in the East. His primary duty is to act as a messenger for the Worshipful Master.
The Senior Deacon of a Masonic Lodge is an assistant officer of the Lodge. He also welcomes and escorts both visitors and candidates into the Lodge and introduces distinguished visitors. It is his duty to assist the Worshipful Master and carry orders between the Worshipful Master and the Senior Warden. During degree rituals, he guides the new candidate and conducts him around the Lodge.
During the opening and closing ceremonies, the Senior Deacon opens the Volume of The Sacred Law to the correct passage of the degree being worked and closes it after the Lodge is adjourned. He also lights and extinguishes the candles at the altar. In some Lodges, he carries the ballot box around the Lodge when new members are being voted upon.
The Senior Deacon’s position is similar to a Manager. The Senior and Junior Deacons both carry long staffs or rods, because as messengers of the Worshipful Master, the staffs are symbolic of the caduceus (or wand) that the Roman winged god and messenger Mercury carried during his duties. On top of the rods are the jewels of their respective offices.