The measure got a bare majority in the House which it would never would have had without that stipulation.

The plan was submitted to the people again with a proposition that the choice of delegates to the Constitutional Convention should be by secret ballot.

The people approved the plan by a substantial majority.
I have no doubt that the pledge above mentioned was made in good faith and that the men who made it meant to keep it.
But before the Convention met two things happened which changed the conditions.

The coalition was wrecked.

There were two causes for its overthrow.