Answer:
I don't understand you.... Complete your sentence first....
General Howe and the British left Boston after seeing Washington's reinforcement.In addition,they were scared when they saw the heavy continental army which had secured Dorchester Heights.Upon seeing this,they wrote Washington a letter informing him of their complete withdrawal from Boston.
Fugitive Slave Acts. Fugitive Slave Acts, in U.S. history, statutes passed by Congress in 1793 and 1850 (and repealed in 1864) that provided for the seizure and return of runaway slaves who escaped from one state into another or into a federal territory.