Anthonie Heinsius wrote Letter L-142 of in response to Letter L-141

October 18, 1683

Heinsius is responding promptly to Leeuwenhoek’s Letter L-141 of 14 October 1683. His previous letter to Leeuwenhoek is Letter L-139 of 8 October 1683. His next letter to Leeuwenhoek is Letter L-161 of 3 August 1685, dated 24 July 1685 O.S.

There is no known reply from Leeuwenhoek to the present letter; his next letter to Heinsius is Letter 86 L-182 of 10 August 1685.