These keyword search strings work in MERLIN or MOBIUS. Copy and paste as needed.
indians AND (narrat* OR commentar* OR account* OR chronicl*) AND translat*
This will get you nearly 400 results, not all of which will be what you are looking for. You can either start looking through all the results, or you can try focusing the search by adding your preferred geographical location, native civilization, etc.:
Indians AND (chronicl* OR account*) AND translat* AND aztec*
...followed by another search:
Indians AND (commentar* OR narrat*) AND translat* AND aztec*
You have to do it as two different searches because MOBIUS and MERLIN can't handle search strings that are too long.
When you have your search results, remember that most e-books belonging to other colleges cannot be lent.
There are certain words that appear in the subject headings of items in MERLIN that constitute primary sources. The most important of them is sources, but there are others.
In the simple keyword search box, you can put such words after SU: in order to specify the SUBJECT field.
ex.: brazil and history and su:sources
In the advanced keyword search, you can put your search term(s) in the top box, and in the second box, put the word(s) you're using to locate primary sources in the next box, and change the drop-down menu to Subject:
Keywords that will help you find primary sources:
Depending on the period being studied, it can also be helpful to limit your search by publication date.
More keywords identifying primary sources in Library of Congress Subject Headings
You can also use the Advanced search to combine any of the above primary source oriented keywords with a particular author.