Article 3, Section 1

Document 5

Maryland Constitution of 1776, ART. 40

XL. That the Chancellor, all Judges, the Attorney-General, Clerks of the General Court, the Clerks of the County Courts, the Registers of the Land Office, and the Registers of Wills, shall hold their commissions during good behaviour, removable only for misbehaviour, on conviction in a Court of law.

The Founders' Constitution
Volume 4, Article 3, Section 1, Document 5
http://press-pubs.uchicago.edu/founders/documents/a3_1s5.html
The University of Chicago Press

Thorpe, Francis Newton, ed. The Federal and State Constitutions, Colonial Charters, and Other Organic Laws of the States, Territories, and Colonies Now or Heretofore Forming the United States of America. 7 vols. Washington, D.C.: Government Printing Office, 1909.