I think the crusial thing (in this context) would be to explain
how Voynich started his business. We know that he arrived
in London penniless - and then married Ethel who was not well-off,
either, and they both gave all their enery (and whatever money
she may have had) to the Russian revolutionary cause.
S.M. Stepniak-Kravchinskii: The London Years
(Russian Biography Series, No 33)
by Donald Senese
Newtonville, Mass.. Oriental Research Partners. 1987
iii, 125 p., [2] leaves of plates. ill., ports.. 24 cm
Bibliography: p. 122-125