Apart from that,
there are documented voyage travelling out from Bergen via Iceland(that's
been missed by the naysayers and others that Ivar Bardson's Icelandic
collegue who were given same mission to perform in Iceland's dioceses as
Ivar in Greenland's, not only travelled on the same ship as Ivar but arrived
in Iceland with it on the ships way to Greenland) and arrived in Greenland.
It's also confirmed in written contemporary documents that Ivar Bardson
voyage to the Western Settlement was to drive out the heathen there and
search for the inhabitants that he didn't find on his journey in 1342. It's
also documented that it was the lawman who gave him that special mission and
that it happened short after they had arrived in Greenland.
That Ivar Bardson and Paul Knutson sailed from Gardar respectively Red
Eric's Brathalid is also confirmed in documents as well as that Ivar Bardson
did deliver tithes from three(!) dioceses under Gardar. Among the delivered
tithes were more than one item which didn't origin in Greenland, Iceland or
Scandinavia and which only could have come from NA. Paul Knutson died within
a few year after returning home. Ivar Bardson lived to be old and his
inheritors had his will and other documents up in court 1400 AD.
There are other documentation for the journey as well, but the above
mentioned details I have presented with references piece by piece over the
last 5 years.