Sketches, Watercolours and Written Passages by Stuart Eldridge
The Volcano Komagatake seen from Mori
July 20th 1872. The script reads: "... (The slope down which we half rolled, half climbed, was at an angle of more than 45° and stretched unbroken from) the peak to the very base of the mountain. A boulder which we started plunged wildly for at least a mile down the slope, leaping sometimes 100 feet into the air and at last disappearing into the forest where its course was marked by a huge commotion among the tree tops. On looking over the above I find I have neglected to give any description of the crater. I should judge it to average from the crater wall, excluding the peak, which forms a part of it, about 500 feet in depth..."
There are several web sites which describe Komagatake (Eldridge spells it "Komagadaki) locatable via the search engines. Below is a contemporary photograph of the volcano from Mori.