There shall be a Clerk of the Circuit Court for each County and Baltimore City, who shall be elected by a plurality of the qualified voters of said County or City, and shall hold his office for four years from the time of his election, and until his successor is elected and qualified, and be re-eligible, subject to be removed for wilful neglect of duty or other misdemeanor in office, on conviction in a Court of Law. In case of a vacancy in the office of Clerk of a Circuit Court, the Judges of that Court may fill the vacancy until the general election for Delegates to the General Assembly, to be held next thereafter, when a successor shall be elected for the term of four years.