o members:</p><dl><dt><code>$cases</code></dt>
<dd><p>An object of class <code><a href="https://rdrr.io/pkg/spatstat.geom/man/ppp.html" class="external-link">ppp</a></code> giving the spatial locations of the 410 infected
farms within a polygonal study region representing the county of Cumbria. The <code><a href="https://rdrr.io/pkg/spatstat.geom/man/marks.html" class="external-link">marks</a></code>
component of this object contain the integer day of infection (from beginning of study period).</p></dd>


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