No doubt there are many large tracts of the earth's surface which have not yet been Investigated, and when these are known we may hope to have our knowledge greatly increased.
"Geology"
James Geikie
This, in proportion to its completeness, enables him to narrow down the field to be Investigated.
"Fine Books"
Alfred W. Pollard
Had he been told on a dark night that it was raining blood on the outside, he would not have disputed it, or Investigated it, believing that such storms were common, though they had escaped his observation; therefore he was not surprised that Tug admired Allan Dorris, although he knew he had no reason to.
"The Mystery of the Locks"
Edgar Watson Howe