According to ¡ºThe
Journal of Hamel¡», they were sent to Namhansanseong
everytime the envoys of the Ching Dynasty visited Seoul
and going out was prohibited by order of the king.
It shows how nervous Joseon was because it was secretly
keeping Hamel and his mates from the Ching Dynasty.
Apparently, their Western technology of weapon was valuable
enough to be attached to Hullyeondogam to contribute
to King Hyojong's policy of expedition to the north.
However, training 35 foreigners(originally they were
36, but one of them died in Yeongam on their way to
Seoul) in Hullyeondogam may create a doubt of the Ching
Dynasty, resulting in hindering the expedition to the
When Hamel and his mates stayed in Seoul, the envoys
of the Ching Dynasty visited Seoul four times. Between
August and September in 1654 when the envoys of the
Ching Dynasty visited Seoul for the first time, Hamel
and his mates stayed in Namhansanseong and their existence
was out of question.
In March, 1655 when the envoys
of the Ching Dynasty visited Seoul, a grave situation
As before, Hamel and his mates were not allowed to go
out and ordered and punish will be mete out for violation.
But two of the Dutch escaped from their place of residence
and jumped into the envoys' return procession asking
them to sent back home.
These people were Hendrik Janse, a chief officer, born
in Amsterdam and Hendrik Janse Bos, a gunner, born in
Fortunately, this incident was straightened after the
envoys received bribes. The Joseon government did not
want a repeat of such kind of incident to happen again.
In a coincidence the two leaders of this incident died
in prison later.
Although Hamel had a doubt whether they died naturally
or executed. As related in Korean historical material(¡ºHyojongsillok¡»,
the 6th year of King Hyojong) it was said that Hendrik
Janse (Nam Buksan in Korean name) was very irritated
in prison that he did not eat at all, and finally succumbed
to a diseaseand died. However there was no mention about
the death Hendrik Janse Bos (Nam Ian in Korean name).
Hamel and his other mates were examined if they knew
about the plan. They were to be given 50 blows on their
bare buttocks to let them know that escape was impossible.
However, this punishment was canceled by order of King
Hyojong because they came to Joseon by shipwreck and
not for plunder.
After that, Hamel and his mates were kept under much
closer observation. After this incident, the envoys
of the Ching Dynasty visited Seoul twice more, and each
visit Hamel and his mates were severely confined.