Yvette Hoitink, CGSM, a board-certified genealogist in the Netherlands reports:
70 records created by the Pilgrims during their time in Leiden were transcribed in Dutch and abstracted in English by the Leiden Archives, who used to have a website to display the information. The website has been offline for a long time, but the data was available as open data. That data was used to create this page.
Most of these records are notarial records or marriage records.