The various levels of heading in the Patrologia Latina Database are represented in the Table of Contents by branches which can be expanded or collapsed. Navigation within the Table of Contents is by means of the icons and which indicate whether you can expand or collapse a branch to change the level of detail displayed.
If you have executed a search, branches of the Table of Contents are marked where relevant with a figure indicating the number of hits (i.e. the number of times the current (or last) search term or expression occurs in the text) covered by that branch. When expanding the Table of Contents, the number of hits listed next to each branch will be recalculated to display the number of hits covered by each level as it is opened.
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