He spoke from firsthand knowledge of the horrors committed by the Tartars.
You may have studied Europe from afar, but you do not know Italy firsthand.
The schools can give the students a firsthand knowledge of the various phases of library work, and this is important.
The character of his comments makes it clear that he had a firsthand knowledge of the books that he cites.
During this period he mastered the use of surveying instruments and made a firsthand study of tides in the region.
Moreover by this means they have gained a firsthand acquaintance with Latin literature and the sources of Roman history.
His tactics so closely resemble mine that I suspect he learned them from me at firsthand.
The whole, in short, is a thrilling narrative of adventure and a firsthand study of the Indian character that cannot be passed by.
Mainly on mountain lions, but firsthand observations on other predatory animals also.
I hope the new Soviet leaders can visit America so they can learn about our country at firsthand.