Ghost Town of Slights or Sleights
Slights (occasionally spelled Sleights, as is spelled on a nearby road). was formed with its two-way station on the Grand Rapids & Indiana Railway, along with a sawmill. The post office was opened on March 3, 1893 the office was changed to Keystone on Dec. 21, 1898.
(Michigan Place Names by Walter Romig, L.H.D. 1986, pg 518)