This is a Dutch East Indies 1836 Pre Stamp Full Letter. It was sent from Batavia to London, and written in English! There are a couple of interesting marks on this cover. To start us off, we have an OVAL ZEE BRIEF DEN HELDER Dated APR 21 in RED along with a ROTTERDAM OVAL in RED, dated APR 24.
There is also an NA POSTTIJD M/S in red on the front, which basically means it was too late. There is a squared AP 26 Mark in RED on the back as well. This is a RARE and MARVELOUS combination of postal markings! Take care because this item, though in very good shape, is still extremely old! This is to ensure that it reaches you in a safe and timely manner, and includes tracking!