Halloween Cemetary EVP

It was Halloween night....OCT 31st 2003....  My husband suggested a bit of ghost hunting after his shift ended at 930p.... so we drove into the nearby town of Leesburg VA...  There are many small cemetaries located within the towns boundaries... so we parked our car, had a small tail-gate of cookies and soda to energize us before we began our stroll...  It was very quiet, and getting slightly cold... We visited 3 sites....  a PINK HOUSE....no EVP,  a church....no EVP   and a cemetary....YES...EVP.... We walked on the outside of a cemetary on which the lands had once held the oldest methodist church in the country  (1700's but the church no longer standing)....  My husband suggested we stop under some trees.... and I turned on my recorder... I was keeping my voice low so as not to disturb and live residents in the houses surrounding the cemetary...  I began by saying...  this is Halloween night...and was wondering if any spirits wished to communicate...  When we played back the tape, in the very beginning where I was saying Halloween night... a voice immediately whispered " H-A-L-L-O-W-E-E-N".  No one was nearby us when we tried this recording...and it is the only thing we got on or recorder which neither of us said...  Who was the visitor ??   We will have to return to see if we have more luck with this spot and perhaps can identify who might have never left the cemetary......