I don't see anyplace obvious. My quick reading of Garber's original paper is that he greatly drew on work by Ernst Krelage which I've linked below. The Appendix I of Thompson (2007) describes in detail how he constructs his time series. I think you'll have to get your hands dirty, get into the weeds of these papers. This is probably a good thing, as the foundation for quality analysis should be some understanding of where the data comes from and what it is. You could try contacting people that are still alive. ### What do these prices represent? Perhaps of interest to this audience is the argument of Earl A. Thompson that the most extravagant prices of the Tulip mania are misinterpreted because they were *strike prices* for deeply out of the money call options rather than *spot* or *futures prices*! Thompson writes, > ... on February 24, 1637, a large organization of Dutch > florists and planters, in a decision that was later ratified by Dutch > legislatures and courts, announced that all contracts written after > November 30,1636 and before the re-opening of the cash market in the > Spring possessed provisions that were not in the original contracts. > The new provisions relieved their customers of their original > unconditional contractual obligations to buy the future tulips at the > specified contract price but demanded that they compensate the > planters with a fixed percentage of their contract prices The > provisions, in effect, converted the futures prices in the original > contracts to exercise prices in options contracts. Thompson argues that the work of the Dutch legislature essentially turned a futures contract at price $k$ into a call option with a strike price $k$ and payment of $\alpha k$ due by speculators to farmers where $\alpha$ was administratively determined to be a few percent. This predictably sent the market clearing strike price $k$ through the stratosphere. The Economist FreeExchange blog has some coverage of the academic debate [here](https://www.economist.com/blogs/freeexchange/2013/10/economic-history). McClure and Thomas (2017) question Thompson's interpretation of prices as strike prices instead of spot prices. 17th century Dutch history and law are way outside my area, I'm not a tulip expert, and I don't know which of the several sides to take. ### References Garber, Peter M., ["Tulipmania"][1], *Journal of Political Economy*, 97(3), 535–557., 1989 Krelage, Ernst H., *[Bloemenspeculatie in Neterland][2]*. Amterstdam: van Kampen, 1942 Krelage, Ernst H., *Drie eeuwen bloembollenexport*. The Hague: Rijksuitgeverij, 1946 McClure, JE and DC Thomas, ["Explaining the timing of tulipmania’s boom and bust: historical context, sequestered capital and market signals,"](https://www.cambridge.org/core/journals/financial-history-review/article/explaining-the-timing-of-tulipmanias-boom-and-bust-historical-context-sequestered-capital-and-market-signals/20BEB345A7BB4BF2E84C07F9077361A1/core-reader) *Financial History Review*, 2017 Thompson, Earl A., ["Tupilmania: Fact or artifact?"](https://link.springer.com/article/10.1007%2Fs11127-006-9074-4?LI=true) *Public Choice*, 2007 [1]: http://www.jstor.org/stable/1830454 [2]: http://www.dbnl.org/tekst/krel002bloe01_01/krel002bloe01_01.pdf