I have seen just about as many Belter chairs
and sofas that do not quite fit into one
of the ten listed patterns as do fit. Some
of these chairs and sofas could be early
or late versions of one of the regular patterns,
some are undoubtedly combinations of two
or more patterns and some are different
from any of the patterns. There are any
number of reasons some of the furniture
fits neatly into a pattern category and
some doen't.
One explanation is that a lot of the furniture
was destroyed or lost when it went out of
style. Some of it surely just broke or wore
out. Belter furniture was popular painted
and used as lawn furniture in the 1930's.
It is possible entire patterns could have
been used up in these ways.
Another explanation is that a good part
of no specific pattern Belter furniture
might be made up of either early (1840's)
or late (1860's) variations of Belter's
regular patterns. There is evidence Belter
produced some, perhaps all, of his patterns
over a period of many years. I believe the
amount of no specific pattern furniture
provides some evidence that either Belter
refined and improved upon his designs over
a period of many years, or that he had some
other reason to produce many pieces that
were nearly the same but a little different
from the rest.
A third explanation is that Belter made
a lot of furniture to order. Remember, the
people buying this furniture when it was
new had to be very wealthy in order to be
able to afford it. Perhaps some of these
people wanted their furniture to be unique
and had it custom built just for them.
I suspect the answer to the question "Why
so much no specific pattern furniture?"
is a combination of all these reasons and
probably many more.