<p>I was deferred, so now I'm gonna take Harvard up on their supplementary essay. How do I go about sending it to them? Just write a letter?</p>
<p>.............anybody?</p>
<p>I'd recommend waiting until the end of January or so, and send a letter detailing what's new since they last heard from you (maybe new awards, honors, ECs, sports, etc.), and tell them that you've also attached an extra essay that you feel portrays an important side of you. And then attach an extra essay that you feel portrays an important side of you ;)</p>
<p>And if it isn't important than best not to send it. Many of the accepted EA applicants--possibly even most of them--got in without supplemental essays, so if it isn't crucial, then don't bother!</p>