Three records at FindMyPast under British Merchant Seamen 1835-1857
Wm Sanderson, 42, Sunderland, master, Confidence, of S'Land, 13th Sept [18]36
Wm Sanderson, 40, S'land: records 7 voyages from Confidence 9/36 to Endeavour 4/39. Some are illegible.
Several of the men on this page have an annotation which looks like 'Transpd'
The third record is very sparse in detail, essentially jsu a list of names, but it includes fourteen Wm Sanderson records with different ticket numbers and different places named (including Sunderland and North Shields) — unclear if this is several references to one man.
ADDED: 13 newspaper mentions in 1846 of ‘Endeavour, Sanderson’, all simple arrivals and sailings.