Where the cause of by-election is given as "resignation" or "seeks re-election", this indicates that the incumbent was appointed on his own request to an "office of profit under the Crown", either the Steward of the Chiltern Hundreds or the Steward of the Manor of Northstead.
When a by-election occurs due to resignation or a desire for reelection, it suggests that the incumbent held an office of profit under the Crown, either as the Steward of the Chiltern Hundreds or the Steward of the Manor of Northstead.