Theme-models XII.-XIV.—THREE TYPES OF THE HISTORICAL ESSAY.

Historical matter is so various that it is impossible to suggest in an outline general topics to be. discussed as in the case of.the book review. The models for the historical essay must, therefore, have their basis in structure rather than material, dealing with the relation of para¬graphs rather than with the thought which each should contain.
We have seen that the sentences which develop the fundamental idea in an expository paragraph may stand to each other in coOrdinate or subordinate relation or in coOrdinate and subordinate relation combined. A theme is made up of paragraphs as a paragraph is made up of sentences, and these para¬graphs may be related to one another in any of the three ways that sentences are related ; that is, para¬graphs in an expository theme may be in coOrdi¬nate, subordinate, or mixed relation. In the first theme-model for the historical essay they are in co¬ordinate relation, in the second in subordinate, and in the third in mixed relation.