Lilpup-- the Rose Terrace organ was probably all "under expression" meaning that all the divisions were in chambers with shutters--that was the mansion way, as well as some church organs and all theatre organs built then.
The nomenclature regarding length does not apply ot the windchest, but rather the pipes. a pipe that produces a pitch the same frequency as middle C on the piano is called an "8 foot" stop because the lowest pipe in the set [[middle C) is 8' long, in round numbers, + or - a few inches.
one octive below is a 16' stop, one octave above middle C is 4', two above is 2'.
The Rose Terrace instrument, and its sister-in-law, the Meadow Brook hall organ are what are commonly called "8 foot monsters" by today's players, there was a lot of stops at that pitch, a few 16' stops, a few 4' & 2', tons of 8'.
The Aeolians also had their own pseudo-orchestral nomenclature, lots of "String PP" [[very soft) "String MF" [[middle volume) and trumpet F [[somewhat loud) and lots and lots of duplication throughout. They really were Muzak machines for the manor homes, the owners did not want a bright or loud tone, and often times they spoke through heavy velvet drapes, which did no favors to the sound. But that is what Mr. and Mrs. Gotrocks wanted, to put a roll on [[they were all self-playing, a sort of 18 ton jukebox) and have a nice, low rumble. The Rose Terrace Aeolian in the Northwest Baptist church was a nice suprise, it spoke right out those modernistic wooden grilles and had some top end on it.