Alexander Heriot Mackonochie SSC (11 August 1825 – 15 December 1887) was a Church of England mission priest known as "the martyr of St Alban's" on account of his prosecution and forced resignation for ritualist practices.

Some describe Mackonochie as having "pronounced Low Church views", but he heard Pusey preach and was on personal terms with many of the other leading Anglo-Catholics of the day, especially Charles Marriott.

At this time St George's-in-the-East was a focus for anti-Ritualist rioting which included services being interrupted and stones being thrown at the mission's priests.

In a letter to the patron, John Gellibrand Hubbard, he explained his theological opinions, which included endorsing the (for that time) radically Catholic eucharistic doctrine of G. A. Denison.

St Alban's was the first Anglican church to hold the three-hour devotion on Good Friday (in 1864) and one of the first to celebrate a Harvest Festival.

With his two curates, Arthur Stanton and Edward Russell, and lay assistants he founded schools, soup kitchens, a working men's club, mothers' meetings, clothing funds and more.

The charges brought were elevating the host above his head, using a mixed chalice and altar lights, censing things and persons, and kneeling during the prayer of consecration.

[1] A second lawsuit was brought in March 1874 repeating the old charges as well as adding new ones including the use of processions with a crucifix, the use of the Agnus Dei, and the ancient custom of the eastward-facing consecration.

He travelled several times to the continent and often visited the Bishop of Argyll, and his friend Alexander Chinnery-Haldane, in Ballachulish, Scotland, a place which he loved.

Increasingly his home was his brother's house at Wantage, another place very dear to his heart, where he continued to assist in parochial work as much as possible.

His mental decline continued apace until on 15 December 1887 he got lost in the Forest of Mamore while out walking near the Bishop of Argyll's home in Ballachulish.

After a packed Requiem Mass at St Alban's a special train took mourners to Woking where his body was laid to rest in the cemetery.

A cross of Scottish granite was later raised on the spot where he had died, and in the 1890s a chapel was dedicated to his memory at St Alban's.