And all the firstborn in the land of Egypt shall die, from the firstborn of Pharaoh that sitteth upon his throne, even unto the firstborn of the maidservant that is behind the mill; and all the firstborn of beasts. The first-born of Pharaoh, etc. - From the heir to the Egyptian throne to the son of the most abject slave, or the principal person in each family. See Clarke's note on Exodus 12:29.
The maid-servant that is behind the mill - The meanest slaves were employed in this work. In many parts of the east they still grind all their corn with a kind of portable mill-stones, the upper one of which is turned round by a sort of lever fixed in the rim. A drawing of one of these machines as used in China is now before me, and the person who grinds is represented as pushing the lever before him, and thus running round with the stone. Perhaps something like this is intended by the expression Behind the mill in the text. On this passage Dr. Shaw has the following observation: - "Most families grind their wheat and barley at home, having two portable mill-stones for that purpose, the uppermost of which is turned round by a small handle of wood or iron that is placed in the rim. When this stone is large, or expedition required, a second person is called in to assist; and as it is usual for women alone to be concerned in this employment, who seat themselves over against each other with the mill-stone between them, we may see, not only the propriety of the expression (Exodus 11:5) of sitting behind the mill, but the force of another, (Matthew 24:41), that two women shall be grinding at the mill; the one shall be taken, and the other left." - Travels, p. 231, 4th edit. These portable mills, under the name of querns, were used among our ancestors in this and the sister kingdoms, and some of them are in use to the present day. Both the instrument and its name our forefathers seem to have borrowed from the continent. They have long existed among the inhabitants of Shetland, Iceland, Norway, Denmark, etc.