—We knew perfectly well of course that though it was bound to come to the light he would find considerable difficulty in endeavouring to try to induce himself to try to endeavour to ascertain the spiritual plenipotentiary and so we knew of course perfectly well— Murmuring faces waited and watched; murmurous voices filled the dark shell of the cave.
There are no more uses of "ascertain" in the book.
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A committee was formed to ascertain the level of public support for a new bike path.
The slaveholders have been known to send in spies among their slaves, to ascertain their views and feelings in regard to their condition.
Douglass, Frederick -- Narrative of the Life of Frederick Douglass An American Slave