The contents of the HDA can be discovered through browsing hierarchies or searching the metadata.
The Basic Search allows you to type words or phrases in the search box and click the "Search" button. The search engine will check all the metadata fields for the search terms. e.g., london stage
The following rules apply
Entering multiple words will automatically search for the words as a phrase.
and retrieves items with both search terms in the record, e.g., london and stage
or retrieves items with either search term in the record, e.g., london or stage
not retrieves items with the first but not the second term not in the record, e.g., london not stage
The Advanced Search allows you to specify which metadata fields you wish to find specific words or phrases. Each of these fields can be combined using the Boolean operator menus
Keyword: words in any of the fields 
Creator: the person or entity primarily responsible for the creation of the original resource
Title: the title of the digital file
Description: a brief description of the contents of the file. May include names of people included (as in photographed persons)
Subjects: Library of Congress subject headings
Coverage: Other subject keywords, often based on chronology (e.g., modern era) or geography (greek empire)
Each image in the collection is assigned a unique identification number, such as CAS137. If you know the id number of digital file, the ID Search is the quickest and most efficient way to retrieve it.
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