1Thomas Jefferson to John Staples, 4 May 1814 (Jefferson Papers)
I send you the model of the mouldboard of a plough of a form of my own, and ask the favor of you to cast me two dozen in iron. I presume you will preserve the mould, as I shall probably call annually for a supply. I will thank you to have them ready as soon a s you can, and I will direct them to be called for. they had better be tied together in manageable bundles by bits of nailrod passing...