With this tool you can browse the State Papers correspondence using a series of visual guides. Each step should be completed in the correct order: first, select sender(s) and recipient(s) using the drop-down menu. Next, enter a keyword in the search box and hit the search button: this will display a bar chart of the keyword hits over time on the right-hand panel. Select a time period by clicking and dragging a box over the desired area in the bar chart, and the origins of these letters will be displayed on the mini-map. Lastly, draw a box around an area of interest using the map tools, and click to display the relevant network of letters sent from those origins.
The keyword search accepts regular expressions. Using the search term rebel.* will return rebel, rebels, rebellion, and so forth. For more on the regular expressions you can use see here.
To add several terms, use | to separate the words, and \s and to indicate the beginning and end of each word, except for the beginning of the first and the end of the last. For example, to get results for either ship or war use the search term ship\s|\swar.
Clicking on a link between two nodes will display the letters between those two individuals in the panel on the left.
At the moment, the years 1660-1670 (inclusive) are included, as a demonstration.