Publication InformationBurlington July 26 49

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Son Baird

What volant, natant, or repent thing, of those that fly, swim, or creep, over, in, or around the Bosphorous, do you most desire in pickle? Name the volatile, aquatic, or reptile, & it shall be sent you.

The admiralty manual, saving Master Herschel's honored presence is humbug. Baring Magnetism & one or two other branches, there is no advice about instruments, no formulas, no constant numbers, no tables, no of any sort. It is a big book full of emptiness, and only less bad than Jackson's. Mrs Marsh has been extremely feeble since we left Washington, unable sometimes to walk or even stand. She spent

but three days here, & went back to Brooklyn, where she will remain under D Vanderveer's care till we sail, which I hope will be by Aug. 20 -- I shall remain here a fortnight or thereabouts. Write me in the mean time, & send me another copy of your circular about specimens. Love to as many of yours as are with you from

Yours trulyG P Marsh

References in this letter:

John Frederick William Herschel, ed. A Manual of Scientific Enquiry; published by the commissioners of the admiralty. London, 1849.