According to 1980 notes written by Garrett LAMB, son of Ida Cora GILLUM LAMB &  grandson of James V. GILLUM, his mother Ida was also buried at the Montgomery Cem.
 
"Ida Cora LAMB died Aug. 27, 1926 and was returned to Montgomery Cemetary at Oakland City, Ind.)" " Ida Cora GILLUM LAMB was born Sept 4, 1870 [death cert says Sep 5]" "Ida Cora LAMB was buried in Montgomery Cemetery Oakland City, Ind. near her father James V. GILLUM"
 
I've attached a copy of her death cert that says place of burial, "Oakland City, Ind."
 
THANK YOU so much for putting this information on line so it's accessible.
 
Maureen Pierce
granddaughter-in-law of Garrett LAMB