Having acquired the necessary technical training in his father's establishment, young Bagster commenced business for himself in 1824 as a printer in Bartholomew Close.
John Broad, a Baptist minister, who reported that the subject of Bagster's memoir took an active part in the anti-slavery and temperance movements.
Shepherd's Bush, where he spent the last part of his life, was then a rural neighbourhood, and Bagster occupied some of his leisure in poultry-breeding and bee-keeping.
Though still a young man, ill health led to Samuel retiring from business well before his father, though he remained active in antislavery and temperance.
He was buried at Tottenham Court Chapel, and his remains were removed in 1843 to the family vault in Abney Park Cemetery.