This is indeed by Samuel Tregelles. It was published originally in The Inquirer iii (Sept 1840) p.422 where several lines are slightly different from this version. Most notably, line three of verse one should read 'The rays of blessed light at last' and not 'The harbinger of day at last'. Similarly in the last verse, the second line should read 'Dispel the dreary gloom;' and not 'We wait for Thee to come'. The poem is signed with a capital gamma — an anonymous signature which Tregelles used on other occasions. Timothy Stunt