Mercer v. Wayman
Illinois Supreme Court
137 N.E.2d 815 (1956)
John Mercer died intestate owning 40 acres, survived by his wife, seven children, and (through a predeceased daughter, Lora Wayman) three grandchildren via Oscar Wayman (defendants). After Lora's death, the family executed a deed conveying the land to another son, Fred Mercer (plaintiff), with Oscar Wayman signing on his own behalf and for Lora's children — but the deed had defects that left the Wayman children with an undivided one-seventh interest. Fred and his family farmed the land for 34 years, paid the taxes, took out mortgages, and signed three oil-and-gas leases; the Wayman children also separately signed an oil-and-gas lease during that time. Fred sued to void the Wayman children's lease; the trial court ruled for Fred on statute-of-limitations grounds, and the Wayman children appealed.
Whether one cotenant's assumption of the obligations of other cotenants constitutes adverse possession against those other cotenants' interests, absent affirmative notice of an adverse claim.