Ros,
Yes. I remember to not use online trees. However, this appears to be a source for the marriage (Rhode Island Marriages, 1724-1916) which I believe is acceptable, yes?
Sarah married Niles Helme on 9 March 1769 at Saint Pauls Church, Washington, Rhode Island, United States.<ref>
'''Marriage''':
"Rhode Island Marriages, 1724-1916"<br/>
citing Digital film/folder number: 007578642; FHL microfilm: 908272<br/>
{{FamilySearch Record|F8KT-VL6}} (accessed 29 December 2023)<br/>
Sarah Bent marriage to Niles Helme on 9 Mar 1769 at Saint Pauls Church, Washington, Rhode Island, United States.
</ref>
If this is not an acceptable source, please let me know.