Pursuant to a mining lease and option to purchase agreement made effective December 1, 2007 between Corvus Nevada and a group of arm’s length limited partnerships, Corvus Nevada has leased (and has the option to purchase) patented mining claims referred to as the “Mayflower” claims which form part of the North Bullfrog project. The terms of the lease/option are as follows: - Terms: Initial term of five years, commencing December 1, 2007, with the option to extend the lease for an additional five years. Pursuant to an extension agreement dated January 15, 2016 and fully executed and effective as of November 22, 2017, the parties agreed to extend the lease and option granted for an additional ten years with the same lease payment terms. - Lease Payments: Corvus Nevada will pay USD 10,000 and deliver 50,000 common shares of ITH annually (subject to the anti-dilution noted below). - Anti-Dilution: Pursuant to an amended agreement agreed to by the lessors in March 2015, the Company, all future payments will be satisfied by the delivery of an additional ½ Common Shares of the Company for each of the ITH common shares due per the original agreement (25,000 Common Shares of the Company) annually. Pursuant to the amendment to the lease entered into on September 12, 2021, dated effective August 12, 2021, upon an acquisition transaction of Corvus, the share payment of 25,000 Common Shares of the Company and the share payment of 50,000 common shares of ITH is automatically converted into a cash payment equal to the share value equivalent using the price per share in the acquisition transaction for the shares of the Company and a price per share equal to the 10-day volume weighted average price of the ITH common shares calculated as of the end of the last trading day immediately preceding the payment due date. If an acquisition transaction of ITH occurs, the share payment of 50,000 common shares of ITH is automatically converted into a cash payment equal to the share value equivalent using the price per share in the acquisition transaction for the shares of ITH. - Work Commitments: USD 100,000 per year for the first three years (incurred), USD 200,000 per year for the years four to six (incurred), USD 300,000 for the years seven to ten (incurred) and USD 300,000 for the years 11 – 20 (incurred). Excess expenditures in any year may be carried forward. If Corvus Nevada does not incur the required expenditures in year one, the deficiency is required to be paid to the lessors. - Retained Royalty: Corvus Nevada will pay the lessors a NSR royalty of 2% if the average gold price is USD 400 per ounce or less, 3% if the average gold price is between USD 401 and USD 500 per ounce and 4% if the average gold price is greater than USD 500 per ounce.

Corvus Gold Inc. 10-Q