Final answer:
Based on the elements of contracts, the resolution of this case will depend on whether the essential elements of a contract were present. The principle of Estoppel may apply if Wills accepted Schriner's payments for the lease without objecting or canceling the contract.
Step-by-step explanation:
Based on the elements of contracts, the resolution of this case will depend on whether the essential elements of a contract were present. These elements include competent parties, lawful subject matter, certain terms, consideration, meeting of the minds, offer and acceptance, and legal obligation. In this case, it seems that all these elements were present, as John Wills and Helmut Schriner entered into a formal agreement for the lease of the pasture for a specific amount and duration.
Regarding the principle of Estoppel, it refers to the legal doctrine that prevents a person from denying or asserting something contrary to what they had previously said or done. In this case, if Wills accepted Schriner's payments for the lease in the sixth year and subsequent years without objecting or canceling the contract, it creates a reasonable expectation for Schriner that the lease would continue. Therefore, Wills may be estopped from claiming that the lease had expired.