The Phoebe is listed here as “prize to the sloop of war Ganges, 118 black men or slaves.” Another Ganges prize, the Brig Dispatch, an American merchantman recaptured from the French, arrived the same day .
The August 5th issue of another Philadelphia newspaper, Claypoole’s American Advertiser gives a more complete account of what has transpired :
The Ganges sloop of war has taken an American vessel, from the coast of Africa, bound to the Havanna, with 118 slaves on board. These unfortunate people have arrived at Fort Mifflin, in a very wretched condition. Any donation of cloathing will be received at the Health Office, and immediately conveyed to them. [See advertisement]
Elizabeth Drinker, the Philadelphia diarist, was one of the citizens who saw the advertisement alluded to above, copied it into her diary and then took action.
Aug. 5 . I read this morning in Claypoole’s paper the following piece, headed Humanity.
” Arrived at the Lazaretto yesterday, one hundred and eighteen Black People, without the least clothing, being taken from on board the schooner Phebe, prize to the United States Ship Ganges. The humane citizens are requested to send to the Health-Office at the State House, any kind of linen clothes for their accommodation, as well as to prevent the shock their decency will be exposed to by so many of both exes being thus exposed naked.”
I looked upon this as a call upon humanity indeed, and set about making up a bundle, which I did, of good and suitable things, for the poor naked creatures. Soon after, two women friends were in our office requesting clothes for the negroes below, to be sent to Edwd Garrigus, who is one of the health officers, but as Peter was going to negro’s meeting this afternoon, which is near ye State house, I followed my first intent, and sent them there. 
As we see here, the charitable instincts of the citizens of Philadelphia were called upon and in motion from the very beginning. The wheels of government were also put in motion. Upon arrival on August 4th, Midshipman Calvin Stevens, prize master of the Phoebe, wrote Navy Secretary, Benjamin Stoddert, for instructions. Stoddert, now situated in the nation’s new capital in Washington, wrote back four days later :
To Midshipman Calvin Stevens, U. S. Navy, from Secretary of the Navy
[WASHINGTON, D. C.]
Navy Departmt 8 Augt 1800
Mr CALVIN STEVENS Prize Master
of the Schooner Phoebe of Charleston
with Slaves, Fort Mifflin, near Philad — care of Capt Gill.
SIR! I have recd your letter of the 4th ins. On the expiration of your Quarantine you will apply to Jared Ingersoll Esq. Dist Atty who will direct you what to do with the blacks, & how to proceed to get the Vessel condemned.
If Capº Mullowny has appointed no agent for Prizes, apply to Geo: Harrison Esqr to act as Agent.
After getting clear of the Prizes, you will turn the men with you from the Ganges, over to the Delaware
I am, Sir, yr mo: obt St &c
[NDA. OSW, Vol. 4, 1800–1801.]
Midshipman Stevens was not the only person in need of instructions. While it was abundantly clear that if the Phoebe’s voyage was illegal under the 1794 and 1800 Federal laws banning U.S. participation in the foreign slave trade, the vessel and cargo could be condemned in a Federal Court, with the exception of the slaves. The laws said nothing about how the slaves were to be dealt with. The arrival of the Phoebe with its human cargo apparently caught Navy Secretary Stodddert by surprise, as we can see in his instructions to U.S. Attorney Jared Ingersoll:
To Jared Ingersol, Philadelphia, Pa., from Secretary of the Navy
[WASHINGTON, D. C.]
Navy Dept —
8th Augt 1800 —
JARED INGERSol Esqr
Mr Calvin Stevens has brought into Delaware, the Schooner Phoebe of Charleston with 120 Negroes, captured by the Ganges Captn Maloney [Lieut. John Mullowny, U. S. Navy].
The act of Congress of the last Session intended to annihilate the Slave Trade, is silent as to the disposition of the slaves, It was expected no doubt, the Captains making the Captures, would sell them in the West Indies. I have directed Mr Stevens to apply to you for instructions how to proceed. I suppose measures will be taken by the Government, or by some of the societies for laudable purposes in Pennsylvania to bind out the Blacks for a few years, until they can learn the language of this Country —
I am &C B — S —
[NDA. GLB, Vol. 3, 1799–1800.]
[to be continued…]
 Miller, James. Plan of property of the United States comprising Fort Mifflin, Mud Island, and the Old Lazaretto in the Twenty-fourth Ward Philadelphia, 1860. Map provided by Philadelphia Streets Department, Survey and Designs Bureau via the Philadelphia GeoHistory Network, https://www.philageohistory.org/rdic-images/view-image.cfm/181-02_HP , (Accessed March 30, 2018). The image has been color adjusted for readability.
 Claypoole’s American Daily Advertiser (Philadelphia, Pennsylvania), 8 Aug 1800, p. 3.
 Pennsylvania Gazette (Philadelpha, Pennsylvania), 5 Aug 1800, p3 (chroniclingamerica.loc.gov)
 Claypoole’s American Daily Advertiser (Philadelphia, Pennsylvania), 5 Aug 1800, p. 3 (genealogybank.com)
 Biddle, Henry R. Ed., Extracts from the Journal of Elizabeth Drinker, (Philadelphia, J.B. Lippincott, 1889), 363. The article referred to can be found in Claypoole’s American Daily Advertiser, Tuesday, Aug 5, 1800 Philadelphia, PA Issue: 7373 Page: 3. Peter was the Drinker’s black servant. Edward Garrigues was a devout Quaker, wealthy carpenter, chairman of the Philadelphia Board of Health and a member of the Abolition Society committee convened to assist the newly-arrived Africans. Later, he contracted the indentures of Mira and Miza Ganges. His 1798 diary recorded the agonies of the yellow fever epidemic in Philadelphia. See: Anita DeClue and Billy G. Smith, Wrestling the “Pale Faced Messenger”: The Diary of Edward Garrigues During the 1798 Philadelphia Yellow Fever Epidemic, Pennsylvania History: A Journal of Mid-Atlantic Studies,Vol. 65, Explorations in Early American Culture (1998), pp. 243-268
 Captain Dudley W. Knox, USN (Ret.) ed., Naval Documents Related to the Quasi-War Between the United States and France – Volume 6, Naval Operations from June 1800 to November 1800, (1938, U.S. Govt. Printing Office, Washington D.C.), pp 232-233. This is a transcription from an original cited here as NDA (Naval Department Archives) OSW (Letters to Officers of Ships of War). The Delaware was a 20 gun refitted merchantman stationed at New Castle, Delaware at the time. It was the common practice to re-assign prize crews to other ships rather than ordering them back to the vessel from which they came.