retentions in the British construction industry
... that the use of retentions in the British construction industry, which is now commonplace, had its origins in the Railway Mania of the 1840s?
... that the use of <b id="mwBfo"><a class="mw-redirect" href="./Retentions_in_the_British_construction_industry" id="mwBfs" rel="mw:WikiLink" title="Retentions in the British construction industry">retentions in the British construction industry</a></b>, which is now commonplace, had its origins in the <a href="./Railway_Mania" id="mwBfw" rel="mw:WikiLink" title="Railway Mania">Railway Mania</a> of the 1840s?