Family tree▼
'Samuel Buswell ([son of] Isaac) was of Boxford, 1670-7; of Topsfield in 1683 ...Joseph, b. Aug. 20, 1674, in Boxford; ...'
Boxford was settled in 1645 and incorporated in 1685 (Wikipedia), which explains why the VR was recorded in Topsfield.
'BUSSWELL ... Joseph, s. Samuell, Aug. 20, 1674. CT. R.'
'Mary, b. -----; m. May 15, 1707[A], Joseph Buswell; wid. 1721.'
'Joseph, b. -----; "youngest son" in 1704; prob, m. May 15, 1707[A], Mary Harvey.'