margt howland als christian left a will - 2 ch isabel + Wm - both left £30 when reach 24 - in 1835 both ack rcpt of £30
Margt Howland als Garrett had an illeg ch Thomas - no father named and he appears in all censuses as Thomas Garrett just prior to marr with Wm Howland - I can't immediately see a death for John Quirk but Margt quirk als howland als garrett seems to slide down social scale tho still married but no husb - washerwoman in 51 and in 61 living with her unmarried son Thomas garrett
thus land deeds + wills point to your Wm being son of Wm Howland + Margt Christian - I havn't got Wm senr's will but he may well have left his 2nd wife some land in his will (it was intack thus could be devised at will)