Some of the Malsby family members were Friends near Gunpowder Falls (Maryland).
From Robert Sutcliff. Travels...1804, 1805, & 1806:
[Page 199] 2d Month, 16th. I attended Baltimore forenoon meeting... . In the evening we came to H. J.'s, a minister who is well respected in this neighbourhood. His house and plantation lie near the Gunpowder Falls, and not far from the meeting which bears that name.