General Bol, with unprecedented tenacity, maintained his position as though he were rooted in the very soil.
The Revolt of the Angels|Anatole France
Boluses (bol, L.) are prepared with the same ingredients, and in a similar manner to pills (which see).
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
Among the pictures are the usual groups of soldiers and burgomasters, and the usual fine determined De Ruyter by Bol.
A Wanderer in Holland|E. V. Lucas
Bol painted him in the year 1669, as may be seen by the date on the picture.
The Standard Galleries - Holland|Esther Singleton
Bol was the most distinguished of Rembrandt's pupils in portraiture.
A Popular Handbook to the National Gallery, Volume I, Foreign Schools|Various