Where several agents are given joint authority, the execution of the authority must generally be joint.12 It is sometimes difficult to determine whether agents have joint authority only, or whether the authority is joint and several, but where co-partners are acting as agents, they are presumed to have authority each, to severally perform the duties of the agency.13 This is true also of a public agency. One of the agents of such is usually presumed to have the right to act for all.14

If an authority is given to persons to act jointly, in making a sale of the property of the principal, there would be no authority for one of them alone to execute the authority.15 But if the authority is both joint, and several, either, or both of them may do the act.16

12 Common wealth vs. Canal Corns.,

9 Watts (Pa.), 466. '3 Deakin vs. Underwood, 37 Minn.,

98. 14 Williams vs. School District, 21

Pick. (Mass.), 75. 15 Copeland vs. Merch. Ins. Co., 6

Pick. (Mass.), 198. 16 Cedar Rapids, etc., R. R. Co. vs.

Stewart, 25 Iowa, 115.