David Rankine

“Mithras is a Persian light and warrior god adopted by the Roman army as their tutelary deity.  His name means “Friend”.  Mithras was the emissary of Ahura Mazda, the supreme power of good, who battled Ahriman, the supreme evil.  Mithras slew the divine bull to release its life-giving blood into the earth, and creatures that served Ahriman like scorpions and serpents tried to stop this happening. Mithras was often depicted with a pointed cap, and a number of reliefs show him in the act of slaying the bull.  As a solar god he was directly equated to Sol Invictus by the Romans, as can be seen from inscriptions.[469]  Twelve inscriptions to him have been found to date.[470] There were seven grades in the Mithraic mysteries, which were only open to free men.  The Mithraic cult was highly tolerant of other deities, as is evidences by depictions of other gods in the shrines.  Also as the soldier god, priesthoods were known to bring their statues to the Mithraea (temples) for protection when danger threatened. The Mithraea were usually small, and have preserved their mysteries to an extent as little writing remains from them.  A relief from Housesteads (Northumberland) shows Mithras bearing a sword and spear rising from an egg, surrounded by a hoop depicting the signs of the zodiac.  A silver amulet found at St Albans similarly depicts Mithras rising from a pile of stones.  More commonly images on altars showed him sacrificing a bull, such as at Rudchester (Northumberland), Carrawburgh (Northumberland) and the London Mithraeum.  There are now five known Mithraea in Britain, those at Caernarvon, Carrawburgh, Housesteads, London and Rudchester.  Of these all were purely military apart from the London Mithraea. ”
― David Rankine, The Isles of the Many Gods: An A-Z of the Pagan Gods & Goddesses of Ancient Britain Worshipped During the First Millenium Through to the Middle Ages

“Isis is the Egyptian mother goddess of magick, whose worship prevailed in the Greco-Roman world.  Her name means “Throne”, reflected in her headdress which is shaped like a throne.  Her spouse was originally Osiris, but became Serapis in the Greco-Roman myths, and her son became transformed from Horus to Harpocrates. Evidence of her worship in Britain has been found in an inscription on a jug  found in Southwark (London).[369]  The inscription on the jug indicates an Iseum (Isis temple) in London, but the location of this temple has yet to be determined.  An altar found in Blackfriars records the restoration of a temple to Isis in the third century CE, further reinforcing evidence of her worship.[370]  It has been suggested by some modern writers that the river Isis in Oxfordshire was named after this goddess, though this may in fact be a coincidence. The name of the river Isis is most probably a contraction of the name Thamesis. It is likely that "Thamesis" is a Latinisation of the Celtic river names "Taom"(Thames) and"Uis"(is), giving "Taom-Uis"meaning "The pouring out of water". An engraved onyx intaglio found at Wroxeter (Shropshire) dating to the third century CE shows Isis bearing a sistrum in her right hand.[371]  Another gem from Lockleys (Hertfordshire) dating to the fourth century CE shows Isis standing between Bes and a lioness, all surrounded by a serpent ouroboros.[372]”
― David Rankine, The Isles of the Many Gods: An A-Z of the Pagan Gods & Goddesses of Ancient Britain Worshipped During the First Millenium Through to the Middle Ages