His birthplace Altdorf is the capital of the "Canton Uri", being located in "deepest Switzerland", since 1291. Altdorf is best known as the place where, according to the legend, William Tell shot the apple from his son's head. This act by tradition happened on the marketplace, where in 1895, at the foot of an old tower (with rude frescoes commemorating the feat), there was set up a fine bronze statue (by Richard Kissling of Zürich) of Tell and his son. Valentine had long departed the region when this event took place. 
The immigrant Valentin Alt arrived in North America in October of 1738, first setting foot on this continent in the port of Philadelphia. The ship on which he sailed across the Atlantic, the Davy, was racked by death and disease on its voyage: 160 of the passengers (nearly half) died en route. The ship's captain and both mates were among the casualties, which made it necessary for the ship's carpenter to bring her into port. Valentin Alt and two of his children survived the journey, but it is possible that other members of the family perished along the way.
Valentin settled in the area of Falkner Swamp (now in Montgomery Co., Pennsylvania) by early 1744, and by that time had married his second wife, Maria Catharina Schmidt. She was born 1 Dec. 1722, and was the daughter of Martin and Anna Catharina Schmidt.
In Feb. 1755, Valentin advertised in a Philadelphia newspaper that his land in Falkner Swamp was for sale, and in April of that year his daughter Elizabeth was baptized in York Co., Pennsylvania, which indicates that the family had made their move west.
Valentin Alt did not live long on his York County farm. He signed his will (as 'Valti", the diminutive of Valentin which non-Germans often transcribe as "Felty") on 18 July 1755, and it was brought to probate in York Co., 10 Jan. 1756.
Eight of his children survived him.
Valentin's widow, Maria Catharina, was 33 years old when he died. She was married again, to Henry Conrad, whose land bordered on the York Co. land owned by Valentine Alt, Maria Catharina died 10 Jun 1759 at the age of 36. 
The death date of 23 Nov 1759 has been chosen as the correct date since this researcher has cited the translated will in his research.
An English translation of it is presented herewith, along with a copy of the inventory of his personal estate.
WILL OF VALENTIN ALT In the name of the Holy Trinity and in faith in Jesus Christ, on July 18, in the year 1755, I, Valentin Alt, make my last will, while in good understanding. Imprimis, I give my son Adam Alt for his inheritance from me one shilling sterling.
Secondly, my son Jacob Alt shall have my place and all that I have for £105•, and as the children become of age he shall pay 3 £15. good lawful money to each, and if a child dies Cso sohl die Mauten das Keind Erben ... this is unintelligible to me (H.J.Y.) H. My son Jacob shall keep the children and clothe them until they have learned a trade, or as the CMautenH and executors and my son see fit. The children shall be brought up in the word of God. My son Jacob shall give my wife Maria Catharina 10 bushels of wheat and 5 bushels of corn each year as long as she lives, and keep a cow for her (she shall have her choice of my cows), and my son shall give her 100 pounds of pork each year, and 10s. cash, and if it no longer pleases my wife to live with my son, he shall build her a separate house, and make a garden there.
The bed and one chest my wife shall have, 2 tin dishes, a ChefleinJ to make soup and a Cschmeltz penlein-melting pan?J and a lamb for making Cillegi- bleD my wife shall have that so long as she lives and remains a widow; but if she marries again she shall receive from my son Jacob the grain and corn, but the feeding of the cow, and sowing of the flax shall no longer be done for her when she remarries.
As executors I have nominated Johannes Keckedorn and Andreas Schenck. This is and remains my last will, Vallenttein Alt Valti Alt (SEAL) Johannes Heckedor Andreas Schinck (Translation made by Mr. Henry James Young, Director of The Historical Society of York County, York, Pennsylvania.) 
There are three birth dates given with no source citation besides Find A Grave. It is possible one is a Christening date. The dates given are 1 Mar 1710 (S/B 1701) and 21 Sep 1710. The later date which is referred two twice has been chosen. The sister was born 21 Sept 1710. He was born 1 March 1701 
I would suggest anyone wishing to know more about this family and see where the facts came from, they should read the Valentine Ault: 4 Generations book. It is available from the LDS website as well as other online avenues. This will be used as the definitive source for this profile.
Have you taken a DNA test for genealogy? If so, login to add it. If not, see our friends at Ancestry DNA.
Valentin is 21 degrees from Walter Morrison, 27 degrees from Alison Wilkins and 20 degrees from Victoria of the United Kingdom of Great Britain and Ireland on our single family tree. Login to find your connection.