Contemporary chronicles (Bernaldez among them) and modern accounts alike describe severe hardship during the 1492 expulsion journey, disease, starvation, robbery, shipwreck and, in some accounts, refugees thrown overboard by ship captains, but no source checked, including Jonathan Ray's standard modern academic treatment "After Expulsion," gives a numeric mortality estimate for the journey distinct from the total number expelled, which is already recorded here as a displaced range.
What would resolve this A dedicated demographic or archival study specifically isolating expulsion-journey mortality from the wider 1492 to 1497 diaspora experience, of the kind Kamen's 1988 Past and Present article did for the total population expelled but for which no equivalent study covering deaths in transit could be found.
OpenHistorical demographyMichael Berenbaum and Fred Skolnik (eds.), Encyclopaedia Judaica, 2nd edition