Frederick Clod (b. 1625, d. in or after 1661), was a physician and ‘mystical chemist’ of German extraction. He lived in a sizeable house (taxed on eight hearths) in Axe Yard, London, next door to the Hartlibs

Samuel Hartlib

Samuel Hartlib was a German-British polymath. An active promoter and expert writer in many fields, he was interested in science, medicine, agriculture, politics, and education. He settled in England, where he married and died...

 , whose daughter Mary he married in 1660. He was also a neighbour to the diarist Samuel Pepys

Samuel Pepys

Samuel Pepys FRS, MP, JP, was an English naval administrator and Member of Parliament who is now most famous for the diary he kept for a decade while still a relatively young man...

, who mentions him several times. A minor figure in scientific circles and a friend of Robert Boyle, to which he supplied some very varied recipes.

He came to England in 1652, having been recommended to Hartlib by Johann Moriaen

Johann Moriaen

Johann Moriaen was a German alchemist and early chemist, known as an associate of Samuel Hartlib. He was active in recruiting for Hartlib's network of intellectuals, the Hartlib Circle, and communicating with them. He was a convinced pansophist.With no published works, his activities have been...

. He had been in the service of Frederick III of Denmark

Frederick III of Denmark

Frederick III was king of Denmark and Norway from 1648 until his death. He instituted absolute monarchy in Denmark and Norway in 1660, confirmed by law in 1665 as the first in western historiography. He was born the second-eldest son of Christian IV of Denmark and Anne Catherine of Brandenburg...

, collecting "Rarities", and himself was a native of Holstein

Holstein

Holstein is the region between the rivers Elbe and Eider. It is part of Schleswig-Holstein, the northernmost state of Germany....

.