I am afraid the precedents in the House are that if the Speaker's attention is drawn to the lack of a quorum the Speaker makes a count. If there is no quorum found, the bells are rung to summon the members. I believe that is the established precedent of the House. I could check chapter and verse of Marleau and Montpetit, but I am sure the hon. member for Vancouver Quadra, who knows these things, will want to do that himself to satisfy himself that the Speaker acted properly in the circumstances.
In the House of Commons on May 17th, 2000. See this statement in context.