In Parliament, he sponsored bills in 1891 and 1893 to encourage cheaper train fares for working men, which would have favoured the many clerks in his constituency who commuted to the City.

In 1896, Grace married Baron Hermann von Eckardstein, who was First Secretary of the German Embassy in 1898 and later Ambassador to the Court of St James.

[6] On 16 August 1910, in Metheringham parish church, Lincolnshire, Grace, still known as "Baroness von Eckardstein", married William Ernest George Archibald Weigall, an MP and later governor of South Australia and a baronet.

She was adopted out secretly because her father was Elidor Campbell, son of the 3rd Earl Cawdor, a fact Heather did not discover until very late in her own life.

Heather married New Zealand artist Arthur Gordon Tovey and later published a memoir about trying to discover her parentage, Searching for Grace (2010).

Towards the end of the war it was used as the Officers' Mess for the famous Dambusters 617 Squadron, which was then based at nearby RAF Woodhall Spa.