Do you have a birth year for Josefa? If my math is correct, Alois was about 38 when they married. If Josefa was 24 in 1860, then she would have been born in 1836 and have been 63 when Alois died. She could have remarried. Or she could have lived to an advanced age and died as late as 1930, in which case, that book hasn't been published yet.