Crisis years.

The years the tree remembers a famine.

Between 1815 and 1819, a volcanic eruption at Mount Tambora in Indonesia — the largest in recorded history — cooled the global climate enough to trigger widespread crop failure across Europe. 1816 became known as "The Year Without a Summer." Famine followed, and where famine goes, typhus and other disease follow close behind. Southern Italy was hit hard. In August 2021, Giuseppina Dede of the Museo del Cognome in Padula, Italy — a town just down the road from Sassano — independently confirmed this from her own records: a typhus fever epidemic, tifo petecchiale, struck the area in 1817. That's a genuine, unprompted match to what the tree already showed.

The tree shows it clearly, without needing to be told the history first: deaths jump from a baseline of about 83 a year to 200 a year on average across 1816–1818 — a 2.41× spike, essentially unchanged across seventeen tree updates now. 1817 alone recorded 373 deaths, by far the worst single year anywhere in the tree's 380-year span. The town's own parish population records tell the same story at an even sharper edge: against a population of roughly 3,700, 1817 saw 389 church deaths — a 10.5% death rate in a single year, more than triple the surrounding decades' norm.

The hardest-hit surname is Calandriello (26 deaths in the three-year window), followed by d'Alessio and d'Amato (24 and 23). Eighty-five individual families lost two or more children within the same three years.

No single family shows the full weight of that famine better than Isidoro d'Amato's. Between April and December 1817 alone, the crisis took nine members of his extended family across three generations: two of his siblings (Rosaria Giovanna in April, Donato Antonio in May), his wife Albabella Cusati (August), two of his adult children (Vincenzo Ferdinando in November, Rosa Maria in December), three of his grandchildren (a one-year-old and an eight-year-old among them) — and finally Isidoro himself, on 30 November, at 66. Nine deaths in one household, spanning nearly the entire year, is about as complete a picture of what this crisis actually did to a family as the records offer anywhere in the tree.

Two other households show the same crisis from different angles. Giuseppe Gennaro Russo & Angelica Burzo lost five adult children in barely two years — the largest single-generation loss found — though their line continued, since most of those five had already had children of their own. And Cono Caiafa & Giacomina d'Onza lost three of their children within an 11-week span in mid-to-late 1817, with Giacomina herself dying in the middle of it, on 27 Aug, not yet 40 — a household that lost its mother alongside its children, not just its children.

A second crisis, twenty years later.

The 1816–1818 typhus crisis wasn't the only epidemic the records remember. The San Giovanni Evangelista Defunctorum (death) register notes a cholera outbreak in 1837 — part of the second global cholera pandemic, which reached the Kingdom of Naples that year. The tree bears this out too: deaths in 1837 run 154, against a baseline of about 101 a year across the surrounding decade — a real spike, though a smaller one than 1817's.

One family shows exactly how sudden and total that kind of outbreak could be. Francesco Antonio Matteo di Sisti and Agnese Venezia Lefante, married 3 May 1802, had eight recorded children. Three of them — Vincenzo, Giuseppe, and Maria — all died on the same day, 15 July 1837, per the parish death register, entries No. 56–58. Adult siblings, living in the same household, dying together within hours of one another, is close to a textbook signature of cholera, which can kill within a day of the first symptoms. Francesco himself had already died in 1833 and didn't live to see it; Agnese outlived all three of these children, dying in 1846.

Two more spikes, further along.

The tree shows two more mortality spikes later in the 19th century, first noticed in the Stato Civile death records: 203 deaths in 1862, more than double the surrounding decade's average of about 95 a year, and 156 deaths in 1872, one and a half times the roughly 101-a-year norm of the years around it. Neither year lines up with any of Italy's officially recognized national cholera pandemic years — 1835–37, 1849, 1854–55, 1865–67, 1884–86, and 1893 — so unlike 1817 and 1837, these two don't have an obvious epidemic to point to. That sent us looking for a different kind of explanation, and we found one for 1862, though 1872 is still an open question.

1862 lines up instead with a war, not a disease. After Italian unification in 1861, the former Kingdom of the Two Sicilies erupted into brigantaggio — a brutal, years-long insurgency and military crackdown that some historians consider closer to a civil war than banditry. A source specifically covering Sala Consilina and the Vallo di Diano — Sassano's own district — documents brigantaggio activity and military reprisals, including executions, running through exactly 1861 and 1862. The tree's own data lines up with that timeline: 1861 was already elevated before 1862's spike, consistent with unrest building through 1861 and peaking the following year. It's a plausible, geographically specific explanation — though, unlike 1817's typhus or 1837's cholera, this is a spike we're attributing to violence and its consequences rather than to a documented disease outbreak, and it deserves the same caveat any historical inference does: it's the best-supported explanation found so far, not a certainty.

1872 is less settled. The years around it don't match a recognized Italian cholera wave either, but they do fall within the Great Smallpox Pandemic that swept Europe from about 1870 to 1875, following troop movements from the Franco-Prussian War. The sources documenting that pandemic's severity focus mainly on Northern and Central Europe, and we haven't found a source confirming smallpox specifically in Salerno province or Sassano for 1872 — so this is offered as the most plausible lead, not a confirmed cause. If a parish or civil record ever turns up a cause of death for that year, it would settle the question either way.