... The goods you will please to forward by the first vessel for Potomac (which possibly may be Captain Jordan the bearer of this) as there are some articles that will be a good deal wanted, especially the seine, which will be altogether useless to me if I do not get them early in the spring, or in other words I shall sustain a considerable disappointment and loss, if they do not get to hand in time.
He wrote to Bradshaw and Davidson in London in 1772:
That I may have my seine net exactly agreeable to directions this year I give you the trouble of receiving this letter from me to desire that three may be made. One of them eighty fathom long, another seventy, and the third sixty-five fathom, all of them to be twelve feet deep in the middle and to decrease to seven at the ends when rigged and fit for use; to be so close-meshed in the middle as not to suffer the herrings (for which kind of fishery they are intended) to hang in them because, when this is the case it gives us a good deal of trouble at the busy hurrying season to disengage the seine, and often is the means of tearing it. But the meshes may widen as they approach the ends: the corks to be no more than two feet and a half asunder and fixed on flatways that they may swim and bear the seine up better with a float right in the middle to show the approach of the seine with greater certainty in case the corks should sink; the leads to be five feet apart. The seine I had from you last year had two faults, one of which is that of having the meshes too open in the middle; the other of being too strait rigged; to avoid which I wish you to loose at least one-third of the length in hanging these seines; that is, to let your 80 fathom seine be 120 in the strait measure (before it is hung in the lead and cork lines) and the other two to bear the same proportion, I could wish to have these seines tanned but it is thought the one I had from you last year was injured in the vat, for which reason I leave it to you to have these tanned or not, as you shall judge most expedient ... I would not wish to have them made of thick heavy twine as they are more liable to heat and require great force to work them....
A detailed reply came from James Davidson, a partner in the net company:
London, Sept. 29, 1772. Sir: I had the honour of receiving your letter with instructions concerning your seines. I shall always pay due attention to the contents. I persuade myself you'll say I have fulfilled your instructions given me in these three seines which I heartily hope will be in time for the intended fishery. Am not afraid but they will meet with your approbation and if you should see any alteration wanting if you'll be so obliging as to send a line in the same channel, it shall be attended to with great care. Your order is for the corks to be put on flat ways. I have only put them on the 65 fathom seine for these reasons. We have tried that method before with every other invention for the satisfaction of our fishermen here but they have assured us they really do not bear the net up so well. They are obliged to be tied on so tight that the twine cuts them and are much apter to break and after all in dragging the net they will swim sideways. Now, Sir, you'll readily see the above inconveniences. I have also put six floats in the middle, two together to show the center of the net. Likewise the length of the netting, 120 fathoms for the 80 fathoms, the other two in proportion.
I now enter upon tanning. This, you may assure yourself, they are pretty well wore if you have them tanned for we are obliged to haul them in and out to take the tan and after that hauling them about to get them thoroughly dry before we can possibly pack them or else they would soon rot. Among the hundreds of seines I sent abroad last year or this, I only tanned one besides yours. Therefore have not tanned any of these. I think the three-quarters inch mesh that I have put in the middle of the nets this year will be a cure for the malady you mention of the herrings hanging in the mesh, for last year I only put in inch mesh which upon examination you'll soon perceive. Therefore, sir, I entreat the honour of a line whether or not the two above three-quarters mesh seines answer the purpose. I have tapered them away at the ends to [an] inch and a half.
These nets were designed for hauling ashore by hand. It was not till much later that other nets, of the styles so familiar today, gill nets and pound nets in particular, came into general use.
Much longer seines than Washington needed were used as fish became scarcer. There are tales of them four and five miles long, actually able to block off the entire river, being used in the neighborhood of Mt. Vernon before control laws were enacted and enforced. The catches were enormous. Barges were heaped high with all sorts of fish and towed into Washington City where they were sold before they spoiled, for what they would bring.
Today the pollution for which Washington and Alexandria are responsible has destroyed most fish life within several miles of Mt. Vernon.
Like his fishing predecessors ever since Jamestown, Washington had his troubles with salt. One of his business letters ordering a supply complained: "Liverpool salt is inadequate to the saving of fish.... Lisbon is the proper kind."