If the state fails to pay to the directors of the college the sum of seven thousand dollars ($7,000) annually, pursuant to Section 92211, or if the college ceases to exist, the state shall pay to the heirs or legal representatives of S. C. Hastings, the sum of one hundred thousand dollars ($100,000), and all unexpended accumulated interest, unless the failure is caused by mistake or accident, or the omission of the Legislature to make the appropriation at any one session.