A Fellow of Indeterminate Age

A fellow of indeterminate age, who allowed internal cavities to develop during the solidification of steel jail cells, plucked (with a plectrum, yet!) a fourth of a bushel of the many-seeded berries enclosed in a thickened integument like an indehiscent pod, which had been soaked in vinegar and/or brine.

I could restate that, but I shall forbear.

In conclusion, I ask: Taking into account a packing density approximately 0.8 that of spheres in a tetrahedral arrangement, and the unusual shape of said berries, and that the total volume plucked was one fourth of a bushel, what was the total, expressed in units?

(translation)