Volumes 1 through 20 of Alle de Brieven / Collected Letters, the complete series. Download for free.
Master list (pdf) of all 602 L-numbers, their Leeuwenhoek number, and their Collected Letters number
niece Maria Jans de Molijn buried in Oude Kerk. She was married to Cornelis Haaxman and was living on Schoolstraat.
DTB Delft inv. 43, folio 20