C. Hartwich, Popular Science Monthly (1882)
“ Rabanus is not one of the grand towers of the temple of Science at which posterity will gaze admiringly, nor is he one of the massive buttresses whence numerous shafts and points arise; we should rather compare him to one of the solid stones that are sunk one upon the other into the soft ground to be hardly ever seen again by the eyes of men—one of those who in quiet, busy toil have laid the foundation among the people which now bears so mighty a structure. ”
